2nd Exam theory - kallo Flashcards
- Fossa temporalis
2 4 3 2
Paries anterior
Facies temporalis ossis frontalis
Facies temporalis ossis zygomatici
Paries medialis
Facies temporalis ossis frontalis
Facies temporalis alae majoris ossis sphenoidalis
Facies temporalis ossis parietalis
Facies temporalis ossis temporalis
o Linea temporalis superior
o Linea temporalis inferior
Paries lateralis
Arcus zygomaticus
Processus zygomaticus ossis temporalis
Processus temporalis ossis zygomatici
Communications 2
Fossa infratemporalis
Foramen zygomaticotempoale –> orbita
- Fossa infratemporalis
7
Paries anterior
Facies infratemporalis maxillae Paries medialis
Lamina lateralis processus pterygoidei ossis sphenoidalis
Paries superior
Facies infratemporalis alae majoris ossis sphenoidalis
Paries lateralis
( Arcus zygomaticus)
Ramus mandibulae
Communications
Fissura orbitalis inferior -> orbita
Fissura petrotympanica -> cavum tympani
Fissura sphenomaxillaris (border between fossa infratemporalis and fossa pterygopalatina) -> fossa
pterygopalatina
Foramina alveolaria -> canales alveolares maxillae
Foramen ovale -> fossa cranii media
Foramen spinosum -> fossa cranii media
Foramen mandibulae (in mandibula!) -> canalis mandibulae
- Fossa pterygopalatina
6
Paries medialis
Lamina perpendicularis ossis palatini
Paries anterior
Facies infratemporalis maxillae
Paries posterior
Processus pterygoideus
Paries superior
Facies maxillaris alae majoris ossis sphenoidalis
Communications
Foramen sphenopalatinum -> meatus nasopharyngeus cavi nasi
Foramen rotundum -> fossa cranii media
Fissura orbitalis inferior -> orbita
Fissura sphenomaxillaris -> fossa infratemporalis
Canalis pterygoideus (in the root of proc. pterygoideus ossis sphenoidalis) -> basis cranii externa
Canalis palatinus major (os palatinum) -> foramen palatinum majus -> cavum oris
- Orbita
7
Auditus orbitae
Margo supraorbitalis ossis frontalis
Margo infraorbitalis maxillae et ossis zygomatici
Apex orbitae
Paries medialis
Processus frontalis maxillae
Os lacrimale
Lamina orbitalis ossis ethmoidalis
Corpus ossis sphenoidalis
Paries superior
Pars orbitalis ossis frontalis
Facies orbitalis alae minoris ossis sphenoidalis
Facies orbitalis ossis zygomatici
o Fossa glandulae lacrimalis
Paries inferior
Facies orbitalis maxillae
o Sulcus infraorbitalis
Communications
Canalis opticus -> fossa cranii media
Fissura orbitalis superior -> fossa cranii media
Foramen ethmoidale anterius -> fossa cranii anterior
Foramen ethmoidale posterius -> cavum nasi
Canalis nasolacrimalis -> cavum nasi (meatus nasi inferior)
Canalis infraorbitalis -> foramen infraorbitale -> facies anterior maxillae
Fissura orbitalis inferior -> fossa pterygopalatina, fossa infratemporalis
- Cavitas nasi ossium
11
Paries superior
Lamina cribrosa Paries inferior
Palatum osseum
Paries lateralis
Facies nasalis maxillae
Os lacrimale
Concha nasalis inferior
Labyrinthus ethmoidalis
Lamina perpendicularis ossis palatini
Lamina medialis processus pterygoidei
Paries medialis (septum nasi)
Lamina perpendicularis ossis ethmoidalis
Vomer
Paries posterior
Facies anterior corporis ossis sphenoidalis
Choanae
Paries anterior
Os nasale
Apertura piriformis (os nasale, incisura nasalis maxillae)
Meatus nasi superior -> cellulae ethmoidales
Meatus nasi medius -> cellulae ethmoidales
Meatus nasi medius -> hiatus sinus maxillaris -> sinus maxillaris
Meatus nasi medius -> apertura sinus frontalis -> sinus frontalis
Meatus nasi inferior -> canalis nasolacrimalis -> orbita
Meatus nasi communis -> apertura piriformis
Meatus nasi communis -> cribrae ethmoidales -> fossa cranii anterior
Meatus nasi communis -> canalis incisivus -> cavum oris
Meatus nasopharyngeus -> apertura sinus sphenoidalis -> sinus sphenoidalis
Meatus nasopharyngeus -> foramen sphenopalatinum -> fossa pterygopalatina
Meatus nasopharyngeus -> choana -> basis cranii externa
- Fossa cranii anterior
2
Borders
Squama frontalis
Ala minor ossis sphenoidalis
Sulcus prechiamaticus
Base formations
Lamina cribrosa ossis ethmoidalis
Pars orbitalis ossis frontalis
Ala minor ossis sphenoidalis
Structures
Crista galli
Crista frontalis
Impressiones digitatae
Juga cerebralia
Communications
Cribrae ethmoidales -> cavum nasi (meatus nasi communis)
Foramen ethmoidale anterius -> orbita
- Fossa cranii media
9
Borders
Sulcus prechiasmaticus
Ala minor ossis sphenoidalis
Pars squamosa ossis temporalis
Sulcus sinus petrosi superioris
Dorsum sellae
Base formations
Corpus ossis sphenoidalis
Ala major ossis sphenoidalis
Pars squamosa ossis temporalis
Facies anterior parti petrosae
Structures
Sulcus prechiasmaticus
Sella turcica
Tuberculum sellae
Fossa hypophysialis
Dorsum sellae
Sulcus caroticus
Impressiones digitatae
Juga cerebralis
Sulci arteriosi
Tegmen tympani
Eminentia arcuata
Impressio trigemini
Communications
Canalis opticus -> orbita
Fissure orbitalis superior -> orbita
Foramen rotundum -> fossa pterygopalatine
Foramen ovale -> fossa infratemporalis
Foramen spinosum -> fossa infratemporalis
Canalis caroticus -> basis cranii externa
Foramen lacerum -> basis cranii externa
Hiatus canalis n. petrosi majoris -> canalis nervi facialis -> foramen stylomastoideum or meatus acusticus internus
Hiatus canalis n. petrosi minoris -> canaliculus tympanicus -> cavum tympani -> fossula petrosa
- Fossa cranii posterior
8
Borders
Dorsum sellae
Sulcus sinus petrosi superioris
Sulcus sinus transversi
Protuberantia occipitalis interna
Base formations
Os occipitale
Facies posterior partis petrosae ossis temporalis
Pars mastoidea ossis temporalis
Angulus mastoideus ossis parietalis
Structures
Clivus
Sulcus sinus petrosi inferioris
Sulcus sinus sigmoidei
Crista occipitalis interna
Communications
Foramen magnum -> canalis vertebralis
Canalis hypoglossi -> basis cranii externa
Canalis condylaris -> basis cranii externa
Foramen jugulare -> basis cranii externa
Foramen mastoideum (mastoideuksen takana) -> basis cranii externa
Porus et meatus acusticus internus -> canalis nervi facialis -> foramen stylomastoideum -> basis cranii externa
Canaliculus cochleae -> auris interna
Canaliculus vestibule -> auris interna
- Mimetic muscles around eye and on calvaria
Eye region muscles
M. corrugator supercillii, “thinking”
o. glabella
i. the skin of the eyebrows
f. vertical folds in forehead
–> penetrates orbicularis oculi and venter frontalis os occipitale
M. orbicularis oculi
Pars orbitalis (c) – acts as a sphincter, attach to medial palpebral ligament
Pars palpebralis (a) – closes the eyelid
Pars lacrimalis (at the medial corner) – expands the lacrimal sack –> tears
Calvaria region muscles
- M. occipitofrontalis, divided into venter occipitalis and venter frontalis, “what money?” The white tendon is called galea aponeurotica.
Venter occipitalis
o. linea nuchae superior
i. galea aponeurotica
venter frontalis
o. galea aponeurotica
i. the skin of the eyebrows
f. elevation eyebrowns, wrinkles forehead
- Mimetic muscles around on the mouth
Mouth region muscles
M. levator labii superioris
Medial fibers are knows as M. levator labii superioris alaeque nasi.
o. margo infraorbitalis maxillae
i. skin of the upper lip
f. elevation of upper lip
M. levator anguli oris, “self-confidence, smile”, deep muscle o. fossa canina
i. skin at the angle of the mouth
f. elevatio of the corner of the mouth
–> lies deep to m. orbicularis oris
M. orbicularis oris, two pars; pars marginalis, pars labialis, “kissing muscle”. Pars marginalis is the outer part and pars labialis is the inner/lip part.
o. maxilla and mandibular
i. skin around the lips
f. closes the mouth and pucker the lips
M. zygomaticus, “real smile, laughter, pleasure”. Major and minor. Minor is upper and major is lower.
o. os zygomaticus
i. skin at the angle of the mouth
f. elevatio the angle of the mouth
M. risorius, “dimples, laughing muscle”, old people do not have this muscle anymore
o. fascia masseterica
i. skin at the angle of the mouth
f. reacts the angle of the mouth to produce smile
Fake smile if only used this muscle because without m. zygomaticus major and minor which elevates the lips and causes “crow’s feet” around the eyes using m. orbicularis oculi.
Makes nasolabial folds.
M. buccinator, “satisfaction”
o. processus alveolaris maxillae et mandibulae
raphe pterygomandibularis (Band of CT between hamulus pterygoideus and mandibular behind molar teeth.)
i. skin at the angle of the mouth, fibers of the m. orbicularis oris
f. reduce the volume of the mouth, tube instrument players (blowing)
M. depressor labii inferioris, “perserevance”
o. basis mandibule below foramen mentale
i. skin of the lower lip
f. moves lower lip downward
M. depressor anguli oris, “sadness”
o. basis mandibulae
i. skin at the angle of the mouth
f. depression the angle of mouth
M. mentalis “doubt”
o. processus alveolaris mandibulae, juga alveolaria
i. skin of the chin
f. elevatio and wrinkles the skin of the chin
- Masticatory muscles
Origo and insertio are in the bone.
M. temporalis, “eating”
o. planum temporale
i. processus coronoideus mandibulae
f. elevatio mandibula
posterior fibers – move mandibula backward
M. masseter, “closing of the mouth”
o. arcus zygomaticus
i. tuberositas masseterica mandibulae
f. elevatio mandibula
M. pterygoideus lateralis
o. facies infratemporalis alae majoris lamina lateralis processus pterygoidei
i. fovea pterygoidea mandibulae
f. bilateral – moves mandibula forward, depression mandibula unilateral – moves mandibula the opposite side
M. pterygoideus medialis, two pars
o. fossa pterygoidea ossis sphenoidalis
i. tuberositas pterygoidea mandibulae
f. bilateral – moves mandibula forward, elevatio mandibula unilateral – moves mandibula to the opposite side
- Art. temporamandibularis movements of
Art. temporomandibularis (art. ellipsoidea)
Caput mandibulae
Fossa mandibularis
Tuberculum articulare
–> Discus articularis
–> Capsula articularis
–> Lig. laterale (from arcus zygomaticus to collum mandibulae)
frontal axis: depressio/elevatio
Vertical axis: right and left / opposite sides
luxation: articulate surfaces are not correctly
Elevatio mandibula
M. temporalis
M. masseter
M. pterygoideus medialis
Depressio mandibula
M. mylohyoideus
Venter anterior m. digastrici
M. geniohyoideus
Platysma
Forward movement of mandibula
M. pterygoideus medialis et lateralis
Backward movement of mandibula
Posterior fibers of m. temporalis
Lateral movement of mandibula
Unilateral contraction of m. pterygoideus medialis et lateralis
- Fascias of the head
Fasciae capitis
Fascia temporalis: Covers m. temporalis. Attached to linea temporalis superior and galea aponeurotica. Over the muscle it splits into two plates. Lamina superficialis ends at the outer surface of arcus zygomaticus. Lamina profunda ends at the inner surface of arcus zygomaticus. Fat tissue between the plates.
Fascia masseterica: Covers m. masseterica. Extends from arcus zygomaticus to the lower border of basis mandibule. Anteriorly continues into fascia parotidea and posteriorly into fascia buccopharyngea.
Fascia parotidea: Surrounds parotid gland. Attach to arcus zygomaticus and the cartilage of external ear.
Fascia buccopharyngea: Covers m. buccinators and continues into pharynx.
- Suprahyoid muscles
M. mylohyoideus
o. linea mylohyoidea
i. os hyoideum
f. moves mandibular down (if os hyoideum is
fixed) or os hyoideum up (if mandibular is fixed) in case of swallowing
M. digastricus (venter anterior)
o. fossa digastriga
i. tendon connected with os hyoideum
f. moves mandibular down (if os hyoideum is fixed) or os hyoideum up (if mandibular is fixed)
M. digastricus (venter posterior)
o. incisura mastoidea
i. tendon connected with os hyoideum
f. elevatio and moves of hyoideum backwards
M. stylohyoideus
o. processus styloideus
i. os hyoideum
f. elevatio and moves of hyoideum backwards
M. geniohyoideus
o. spina mentalis
i. os hyoideum
f. depressio mandibular and elevatio os hyoideum
- Infrahyoid muscles
M. sternohyoideus
o. manubrium sterni
i. os hyoideum
f. depressio os hyoideum
M. sternothyreoideus, (deeps to m. sternohyoideus)
o. manubrium streni
i. cartilago thyreoidea of larynx
f. depressio larynx
M. thyreohyoidus
o. cartilago thyreoidea of larynx
i. os hyoideum
f. depressio os hyoideum, elevatio larynx
M. omohyoideus
Venter superior:
o. os hyoideum
i. continues into tendon
venter inferior:
o. margo superior scapulae
i. continues into tendon
f. depressio os hyoideum and moves it a little bit laterally
- Mm. laterales colli,mm. profundi colli
f. bilateral – flexio capitis and colli
unilateral – lateroflexio colli to the same side
If vertebral column is fixed these muscles act as inspiration muscles.
M. scalenus anterior (closest to neck)
o. PT C 3-6
i. tuberculum musculi scalene anterioris costae prima
M. scalenus medius
o. PT C 2-7
i. facies superior costae I (behind sulcus a. subclaviae)
M. scalenus posterior (lowest and most far to the neck)
o. PT C 5-7
i. costa secunda
Musculi profundi colli
f. bilateral – flexio colli
unilateral – lateroflexio colli to the same side
M. longus capitis
o. PT C 3-6 (same as m. scalene anterior)
i. pars basilar is ossis occipitals
M. longus colli
o. PT C 2-5
corpus vertebrae cervicalis C5-7
Vertebrae thoracicae T1-3
i. tuberculum anterius atlantis
corpus vertebrae C2-4
PT C6
M. rectus capitis anterior
o. PT atlantis
i. pars basilar is os occipitalis
M. rectus capitis lateralis
o. PT atlantis
i. processus jugularis os occipitalis
- Fascia colli
Surrounding connective tissue fascias around the muscles and spaces between the fascias.
Lamina superficialis surrounds the neck from all sides. Makes 2 separate fibrous sheats for m. sternocleidomastoideum and m. trapezius.
Superiorly it attaches to:
basis mandibula
processus mastoideus
linea nuchalis superior
protuberantia occipitalis externa
Inferiorly it attaches to:
manubrium sterni (outer surface)
clavicula
acromion
spina scapula
Posteriorly it gives a sagittal septum which joins with ligamentum nuchae and processus spinosi cervical vertebralis.
Anteriorly it attaches to os hyoideum and above it it splits into 2 laminas/plates. Lamina superficialis attaches to external basis mandibula. Lamina profunda attaches to internal basis mandibula. Space between these two laminas is called spatium submandibulare. Submandibular salivary gland is located there.
Lamina pretrachealis is located in anterior region of the neck. It is trapezium-like in shape. It makes a sheat for infrahyoid muscles, organs such as larynx, glandular thyoidea, parotidea, pharynx, beginning of oesophagus. Upper border is os hyoideum. Inferior border incisura jugularis (internally manubrium sterni and clavicle). Laterally it covers m. omohyoideus.
Between lamina superficialis and lamina pretrachealis there is a closed space called spatium suprasternale. –> fat tissue and superficial veins.
Lamina prevertebralis covers lateral and deep muscles of the neck. Superiorly it is attached to basis externa
cranium. Inferiorly it is attached to thoracic cavity as fascia endothoracica. Ends on ps. C7.
Between lamina pretrachealis and lamina prevertebralis there is an open space called spatium retropharyngeum
which connects with mediastinum superius. (possible site for infection)
- Topography of the neck
Trigonum colli medium
Borders are:
Basis mandibulae
m. sternocleidomastoideus dextra
m. sternocleidomastoideus sinistra
Trigonum colli mediale/anterior
Trigonum colli mediale includes 3 smaller triangles:
1. Trigonum submandibulare
2. Trigonum omohyoideum s. caroticum
3. Trigonum omotracheale
Borders are:
Basis mandibulae
m. sternocleidomastoideus midline
- Trigonum submandibulare
borders are:
basis mandibulae
venter anterior m. digastrici
venter posterior m. digastrici - Trigonum omohyoideum s. caroticum
Borders are:
Venter posterior m. digastrici
Venter superior m. omohyoidei
m. sternocleidomastoideus - Trigonum omotracheale s. trigonometry musculare (infrahyoid muscles also trachea)
Borders are:
Venter superior m. omohyoidei
m. sternocleidomastoideus midline
Trigonum colli laterale
Trigonum colli laterale is divided into 2 smaller triangels:
1. Trigonum omotrapezoideum
2. Trigonum omoclaviculare borders are:
m. sternocleidomastoideus
m. trapezius
clavicula
- Trigonum omotrapezoideum
Borders are:
m. sternocleidomastoideus
m. trapezius
venter inferior m. omohyoidei - trigonum omoclaviculare
borders are:
m. sternocleidomastoideus
venter inferior m. omohyoidei
clavicula
Spatia intermuscularia
There are 2 spatia:
- Spatium antescalenum
Borders are:
m. sternohyoideus
m. sternothyreoideus
m. scalenus anterior
costa prima
vena subclavia - Spatium interscalenum
Borders are:
m. scalenus anterior
m. scalenus medius
costa prima
arterie subclavia/nerves of plexus brachialis
- Cavitas oris ( vestibulum oris,cavitas oris propria)
Consists of two parts: Vestibulum oris and Cavitas oris propria
Vestibulum oris:
Slip-like space between:
- The lips – labia: –> formed by m. Orbicularis oris
Boarded by:
o Labium superius et labium inferius
- connected at angulus oris by commisura labiorum
- Labium superior reaches the external nose and laterally sulcus nasolabialis -> in the middle of the upper lip a groove is present – philtrum
- Labium inferior extend into the lower direction to the chin and the sulcus mentolabialis
- The cheeks – bucca
- Processus alveolaris mandibulas et maxillae
–> Covered by the gum – gingiva
–> the teeth – dentes
Communicates with the surface of the body by the oral opening – rima oris
Communicates with cavitas oris propria, when the jaws are closed through narrow clefts between opposing teeth and by an aperture on both sides behind the molars.
The lips
The lips are covered externally by skin and internally by mucosa
The vermilion boarder, is the transitional zone from skin to the mucosa
The mucosa contains glandulae labiales
The inner surface of each lip is connected in the midline to the corresponding gum by frenulum labii
superioris and frenulum labii inferioris
Bucca
Forms the sides of the face and continues into the lips
The base is formed by m. buccinator
o covered by fascia buccopharyngea
Corpus adiposum buccae lies on m. buccinator
Externally covered by skin and internally covered by mucous membrane
At the level of the 2nd upper molar tooth in the mucous membrane is papilla ductus parotidei
Gingiva
Composed of dense fibrous tissue, closely connected to the periosteum of processus alveolaris mandibula et maxillae and surrounding the necks of the teeth
There are no glands in the mucous membrane of the gum
Cavitas oris propria
Limited laterally and anteriorly by processus alveolaris maxillae et mandibule and by the teeth
posteriorly it communicates with the pharynx by isthmus faucium
Roofed with the hard (palatum durum) and soft palate (palatum molle)
The floor is composed of three muscles:
o m. mylohyoideus
o venter anterior m. digastrici
o m. geniohyoideus
Glandula submandibularis is situated beneath the muscles
On the upper surface of the muscles lies glandula sublingualis, covered by the mucous membrane
Medially to Plica sublingualis is caruncula sublingualis
- Dentes
Two sets of teeth:
o Dentes decidui20 – 6-8 months (primary milk teeth) o Dentes permanentes 32 – 6-12 years
o Dens serotinus 17-24 years (wisdom tooth)
- Dens inscivus – for biting
- Dens caninus – tearing and gripping
- Dens premolaris – chewing movement
- Dens molaris – chewing
Corona dentis = crown
Radix dentis = root
Cervix dentis = neck
Cavitas dentis
Cavitas coronae
Cavitas radices dentis
Foramen apicis dentis for Bv and nerves
Pulpa dentis is soft part
- Lingua
Takes part in chewing, sucking, contains sense organs for taste and touch and is involved in speech production
- two parts:
1. Corpus linguae - central part
–> anterior part of the body is the apex linguae
2. Radix linguae – posterior part, connected to os hyoideum - On corpus linguae is the upper part – dorsum linguae and the lower part – facies inferior linguae
- Margo linguae is between the dorsum and the lower surface
- Sulcus medianus linguae is in the middle of the dorsum
- Sulcus terminalis linguae is between the dorsum and the root
- Foramen caecum linguae is in the middle of sulcus terminalis linguae
- Tonsilla lingualis is on the root
The mucous membrane of the tongue contains numerous glands – glandulae linguales
The mucous membrane forms three folds from the root of the tongue toward the epiglottis:
o Plica glossoepiglottica mediana
o Plica glossoepiglottica lateralis dextra et sinistra
2 depressions between them - vallecula epiglottica
- The mucous membrane of the tongue contains numerous glands – glandulae linguales
- The mucous membrane forms three folds from the root of the tongue toward the epiglottis:
1. Plica glossoepiglottica mediana
2. and 3. Plica glossoepiglottica lateralis dextra et sinistra
–> 2 depressions between them - vallecula epiglottica - The mucosa forms a fold in the midline of the lower surface of the tongue – frenulum linguae
–> connects the tongue with the gum of mandibula
Numerous papilla linguales on the dorsum of the tongue
o Papillae filiformes – across the dorsum of the tongue, a rough surface
o Papillae fungiforme – around the margin and the tip of the tongue, contain taste buds
o Papillae vallate – 7-11, arranged frontally of sulcus terminalis, contains taste buds
o Papillae foliate – transverse folds of the mucosa at the margin and the tip of the tongue,
Extrinsic muscles:
M. Genioglossus
o. Spina mentalis mandibula
i. Root of the tongue
f. Pulls the tongue forward and downward
M. Styloglossus
o. Processus styloideus
i. Root of the tongue
f. Pulls the tongue backward and downward
M. Hyoglossus
o. Os hyoideum
I. Root of the tongue
f. Pulls the tongue backward and downward
Intrinsic muscles run perpendicular to each other and their main function is to change the shape of the
tongue:
M. Longitudinalis superior et inferior
from apex linguae
shortens the tongue
M. Verticalis linguae
connects radix linguae with the lower surface of the tongue
flattens toung
M. Transversus linguae
from median fibrous septum
passes laterally to the sides of the tongue
narrows the tongue
- Glandulae salivariae
Glandulae salivariae minores are scattered in the mucous membrane of the oral cavity and tongu
o glandulae labiales
o glandulae buccales
o glandulae palatinae
o glandulae linguales
Glandulae salivariae majores:
o glandula parotidea
o glandula sublingualis
o glandula submandibularis
Glandula parotidea
Largest salivary gland
Pars superficialis – lies in front of the external ear on m. masseter
Pars profunda – is situated in the retromandibular fossa
Fascia parotidea surrounds the parotid gland
Ductus parotidus starts at the gland’s anterior boarder, crosses m. masseter and runs through m. Buccinator and opens into the vestibulum oris on papilla parotidea
Glandula submandibularis
Lies in trigonum submandibulare
Surrounded by lamina superficialis fasciae cervicales / fasciae colli superficiales
Opens on caruncula sublingualis
Glandula sublingualis
The mucous membrane covers the gland and forms plica sublingualis
The gland has several ducts, but the main duct – ductus sublingualis major opens on caruncula sublingualis together with ductus submandibulare
Ductus sublinguales minores open by small openings directly on plica sublingualis
- Pharynx
Placed behind the nasal and oral cavities and the larynx
The airway and food passage crosses the pharynx
Cavitas pharyngis is divided into 3 parts:
1. Pars nasalis pharynges s. nasopharynx
2. Pars oralis pharynges s. oropharynx
3. Pars laryngea pharynges s. laryngopharynx
Wall structure:
Tunica mucosa
o glandulae pharyngeales in mucous membrane
o Pars nasalis pharynges s. nasopahrynx: respiratory epithelium
o Pars oralis et laryngea: stratified squamous epithelium
Fascia pharyngobasilaris –> soft skeleton of the pharynx between mucous and muscular layer.
–> Transforms into tela submucosa toward the oesophagus.
Tunica muscularis
Tunica adventitia
Nasopharynx – s. Pars nasalis pharynges
- Lies behind cavitas nasi from basis cranii externa palatum molle (soft palate)
- Skeletotopically: C1 to C2
- attached to basis cranii externa and forms fornix pharynges
- Anteriorly nasopharynx comminucates via choana with cavitas nasi
- Between the superior and posterior walls of pharynx is tonsilla pharyngealis
- In the lateral wall of pharynx is ostium pharyngeum tubae auditivae
–> This opening leads via tubae auditivae to the cavitas tympani
- equalizing the air pressure on both sides of membrana tympanica
- Torus tubarius – a protube of cartilage from tubae auditivae
- Recessus pharyngeus – small recess behind the opening of tubae auditivae
- Below the pharyngeal opening is tonsilla tubaria
Oropharynx – s. Pars oralis pharyngis
- From palatum molle –> epiglottis
- Skeletotopically: C3 to C4
- Anteriorly it communicates with cavitas oris through isthmus faucium
Laryngopharynx – s. Pars laryngea pharyngis
Lies behind larynx
from epiglottis oesophagus
Skeletotopically: C5 to C6
Two openings: the aditus laryngis and oesophagus
Tonsils of the pharynx
- Tonsillae tubariae (one on each side)
- Tonsilla pharyngealis (single at the top of the pharynx)
- Tonsilla palatina (paired)
- Tonsilla lingualis (single)
Anulus lymphoideus pharyngis (Waldeyer’s throat ring)
Muscles of pharynx
(constrictors, elevatio pharynx):
M. Constrictor pharyngis superior
o. Processus pterygoideus
rhaphe pterygomandibularis
linea mylohyoidea
margo linguae
M. Constrictor pharyngis medius
o. Os hyoideum
M. Constrictor pharyngis inferior
o. Cartilago thyroidea
cartilago cricoidea
i. Raphe pharynges
f. Narrows the pharyngeal space and elevatio pharynx
(levatores, elevatio pharynx):
M. Stylopharyngeus
o. Processus styloideus
M. Palatopharyngeus
o. Palatine aponeurosis
i. Lateral wall of pharynx
f. Elevatio pharynx
Topography of pharynx
Holotopically: Cervical region
Skeletotopically: Basis cranii externa –> C6
Syntopically:
- Anteriorly:
cavitas nasi
cavitas oris
cavitas larynges
- Laterally: BV, nerves
- Posteriorly:
mm. profundi colli
fascia prevertebralis of fascia cervicales
columna vertebralis - Posteriorly there is spatium retropharyngeum and it extends laterally to spatium parapharyngeum
- Both spaces continue into mediastinum superius
- Oesophagus
- Canal about 23-25cm
- Extending from pharynx to gaster
3 parts:
1. Pars cervicalis
-> extend to the level of apertura thoracis superior
2. Pars thoracica
-> apertura thoracis superior to hiatus esophageus
diaphragm
3. Pars abdominalis
-> below hiatus esophageus diaphragm to the ostium
cardiacum
3 narrow spaces:
1. Constricto pharyngooesophagealis
-> Oesophagus entrance, behind cartilago cricoidea
2. Constricto broncoaortica
-> Trachea and r. Aorta, aorta thoracica (Th4-Th5)
3. Constricto phrenica s. Diaphragmatica
-> Passage through diaphragma, beginning of pars
abdominalis
Tunica mucosa
o forms longitudinal folds
Tela submucosa
o contains glandulae oesophageae
Tunica muscularis
o longitudinal and circular layers
Tunica adventitia or tunica serosa
-> Tunica adventitia covers cervical and thoracic part
-> the abdominal part is covered by tunica serosa (peritoneum)
Topography:
Holotopically:
- cervical region
- mediastinum superior and posterior
- cavitas abdominalis
Skeletotopically: C6 - Th11
Syntopically:
Posteriorly: columna vertebralis (aorta crosses at Th8-9)
Anteriorly:
- trachea
- bronchus principalis sinister
- pericardium
- hepar
Laterally:
- BV, nerves
- lobuli glandula thyroidea
- pleura parietalis pars mediastinalis,
- hepar
- Gaster
- Fragments of food are chemically broken down by the gastric juice
- Receives, stores, mixes, and digests ingested food products to form liquid chime.
2 orifices (openings)
1. Ostium cardiacumStomach communicates with oesophagus 2. Ostium pyloricumStomach communicates with duodenum
2 curves
1. Curvatura minor: The lesser concave border
2. Curvatura major: the greater convex border (4-5 times longer)
Incisura angularis
incisura cardialis
2 walls:
o Paries anterior
o Paries posterior
4 portions:
1. Pars cardiaca: entrance to the stomach
2. Fundus gastricus: left side above
3. Corpus gastricum
4. Pars pylorica: exit of the stomach
- incisura angularis marks the
beginning
- Antrum pyloricum
- Canalis pyloricus
The wall has 4 layers:
1. Tunica mucosa
- plicae gastricae (= folds)
–> at curvatura minor go parallerly: functional gastric canal
–> areae gastricae (= small elevations in mucous membrane)
–> foveolae gastricae (= openings of the glands)
–> glandulae gastricae
- Tela submucosa
- Loose CT connection between tunica mucosa and tunica muscularis
- Mucosa form changeable folds –> Adjust to the volume of the stomach (Prevent the mucosa from rupturing due to changes in volume) - Tunica muscularis
- Fibrae obliquae inner smooth muscle layer
- Stratum circulare middle layer
–> forms m. sphicter pyloricus at the ostium pyloricum
- Stratum longitudinale external layer along the curvatures - Tunica serosa
- Surrounds the stomach (intraperitoneal organ)
- Continues to the adjacent organs as 4 LIGAMENTS - Lig. Hepatogastricum (hepar to gaster)
- Lig. Gastrophrenicum (crus sinister of diaphragm to fundus gastricus)
- Lig. Gastrosplenicum (curvatura major to splenic hilum)
- Lig. Gastrocolicum (curvatura major to colon transversum)
Topography:
Holotopically: Regio epigastrica, Regio hypochondriaca sinistra
Skeletotopically:
- Ostium cardiacum: T11
Ostium pyloricum: L1
Syntopically:
- anterior wall:
Hepar
Diaphragm
Anterior abdominal wall
- Posterior wall:
Diaphragm
Splen/Lien
Glandula suprarenalis Ren sinistra
Pancreas
Mesocolon transversum
- Duodenum
C-shaped and winds around caput pancreas
Has 4 parts:
o Pars superior
o Pars descendens
o Pars inferior s. Pars horizontalis
o Pars ascendens
Pars superior
o starts at ostium pyloricum –> crosses columna vertebralis from left to right at the level of L1 –> continues with flexura duodeni superior into the next part
o In the beginning it has a dilated duodenal cap – bulbus s. Ampulla
Pars descendens
o descends along the right side of columna vertebralis to the level of L3 –> forms flexura duodeni inferior –> continues to the next part
Pars inferioris s. Pars horizontalis
o crosses columna vertebralis from the right to left at the level of L3 –> passes the on to the last part
Pars ascendens
o runs upward obliquely to L2 –> forms flexura duodenojejunalis –> continues then into jejunum
Holotopically
- Duodenum regio epigastrica (upper part) and in regio umbilicalis (lower part)
Skeletopically
- Pars superior duodeni – 1st lumbar vertebra
- Pars descendens duodeni – from the 1st to the 3rd lumbar vertebra
- Pars horizontalis duodeni – 3rd lumbar vertebra
- Pars ascendens duodeni – from the 3rd to the 2nd lumbar vertebra
Syntopically
- Duodenum:
Posteriorly:
* abdominal aorta
* vena cava inferior
* the descending part faces ren dexter and glandula suprarenalis dexter
Medially: caput pancreas
Anteriorly:
* colon transversus
* Hepar
Tunica mucosa
o forms plicae circulares with villi intestinales
–> In duodenum there is only one fold – plica longutudinales duodeni (in the descending
part of duodenum)
–> the fold ends at papilla duodeni major, which is formed by the enlargement ampulla hepatopancreatica for the common opening of bile and pancreatic ducts
o glandulae duodenales s. glandulae intestinales
Tela submucosa (loose connective tissue)
o noduli lymphoidei solitarii are scattered in all parts of small intestine
Tunica muscularis (two layers)
o External longitudinal
o inner circular
In the descending part of duodenum
they from a sphincter, surrounding the
hepatopancreatic ampulla.
o The duodenum is a retroperitoneal organ
- Jejunum et ileum
- Involved in the fold of peritoneum – mesenterium intestinale
- Mesenterium is a peritoneal fold which attach jejunum and ileum to the posterior abdominal wall by radix mesenterii
- jejunum and ileum are mobile intraperitoneal coils attached to the posterior abdominal wall by radix
mesenterii (radix mesenterii from flexura duodenojejunalis to ileocaecal junction/art. sacroiliaca dextra) - No strict boarder
o Jejunum is wider, more vascular and deeper in color than ileum
o Ileum is much narrower and thinner
o Jejunum is 2/5 and Ileum is 3/5 of their total common length
holotopy:
- Jejunum regio umbilicalis and regio lateralis sinistra
- Ileum regio lateralis dextra, regio inguinalis dextra, regio pubica and pelvis minor
Syntopy:
Posteriorly: organs of the retroperitoneal space
On the right: colon ascendes
Anteriorly: covered by omentum majus
Inferiorly: descend into pelvis minor
Tunica mucosa
o forms plicae circulares with villi intestinales
Tela submucosa (loose connective tissue)
o noduli lymphoidei solitarii are scattered in all parts of small intestine
o in the end part of ileum are also noduli lymphoidei aggregati
Tunica muscularis (two layers)
o External longitudinal
o inner circular
Tunica serosa (peritoneum) covers jejunum and ileum
completely, making them intraperitoneal organs.
- Intestinum crassum
Average length 100-150 cm
- Important for vital absorbtion and reabsorbtion of water and plasma electrolytes
- Residence for endemic bacterial flora
–> Produce also K and B12-vitamins
- Final process of chyme into faeces for defecation
- Caecum et Appendix Vermiformis
Colon:
o Colon Ascendens
o Colon Transversum
o Colon Descendens
o Colon Sigmoideum
o Rectum
o Canalis Analis
tunica mucosa
- Glandulae intestinales s. cryptae intestinales secrete lubricating mucus
- Lymphatic drainage is well developed in intestinum crassum. In tunica mucosa – noduli lymphoidei
solitari, in appendix vermiformis – noduli lymphoidei aggregati appendicis vermiformis
- Plicae semilunares coli
- well developed in colon, poorly in caecum, not present in
appendix vermiformis and rectum.
tela submucosa
- Lamina propria, mucosae et tela submucosa are very well vascularized with capillaries, venous drainage
is eventually to vena mesenterica superior and finally to venae portae hepatis.
tunica muscularis s. muscularis externa
- Three longitudinal muscle layers in muscularis externa of caecum et colon –> form taeniae coli.
= longitudinal muscle layers, which are reduced to 3 bands.
Taenia libera is free
Taenia omentalis attachment of omentum majus
Taenia mesocolia attachment of mesocolon trnaversum
- Taeniae coli are shorter than intestinum crassum – creating haustra coli
tunica serosa (intraperitoneal) / tunica adventitia (retroperitoneal)
- has fatty protrusions – appendices epiploicae s. appendices omentales
Caecum and appendix:
Caecum is 6-8 cm in lenght, 7-7,5 cm in diameter
(the widest part of intestinum crassum)
Locates in regio inguinalis dextra
Caecum communicates with Ileum via ostium
ileale
o one-way valve formed by tunica mucosa
foldings
communicates with appendix vermiformis via ostium appendicis vermiformis
Colon Ascendens
- 12-20 cm in lenght, smaller in diameter than Caecum
- Locates in regio lateralis dextra
- Goes up untill reaches inferior surface of Hepar formates bending to the left flexura coli
dextra s. flexura coli hepatica and continues as colon transversum
Colon Transversum
- 30-80 cm in length
- The most motile portion of intestinum crassum
- starts from regio hypochondriaca dextra passes transversally with downward convexity in
regio umbilicalis reaching regio hypochondriaca sinistra
- In regio hypochondriaca sinistra makes turn down at flexura coli sinistra s. flexura coli splenica.
- Colon transversum is within peritoneum
–> Fixed to posterior abdominal wall by mesocolon transversum
–> Lig. Gastrocolicum and omentum majus attach to tenia omentalis coli transversi
Colon Descendens
- 10-15 cm in length
- starts at flexura coli sinistra s. flexura coli splenica with direction downwards
- Locates in regio lateralis sinistra
- At the level of crista iliaca sinistra becomes colon sigmoideum
Colon Sigmoideum
- Average 40 cm in length
- Continuation of colon descendens at crista iliaca sinistra
- Locates in regio inguinalis sinistra
- Formates an angled loop and is located in fossa iliaca sinistra
- At the level of art. sacroiliaca dextra continues as rectum
Rectum:
- 13-20 cm in length
- Locates in regio hypogastrica and pelvis minor
- shape called flexura sacralis (correspond the shape of os sacrum)
- In the lower portion of rectum the diameter expands creating ampulla recti (final storage of faeces)
–> When ampulla recti is filled with faeces the need for deficatio is induced due to pressure on m.
sphincter ani internus
Canalis analis:
- Continuation from ampulla recti
- 2-3 cm in length
- penetrates perineum and has flexura perinealis
- Anus is the terminal portion of canalis analis
- Plicae transversae recti
- Columnae anales
- Sinus anales
- Plexus venosus rectalis (in mucosa et
submucosa)
- M. sphincter ani internus
- M. sphincter ani externus
- M. levator ani
Topography:
Holotopia
- Cavitas abdominis caecum , appendix vermiformis et colon
- Pelvis minor rectum et canalis analis
Skeletotopia
- Caecum fossa iliaca dextra, vertebra Lumbalis V
- Colon ascendens vertebra L V cartilagines costarum IX-X, vertebra L II
- Colon transversum skeletotopia is impossible to describe due to large positional variations
(Sobotta)
- Colon descendens cartilagines costarum IX – X, vertebra Lumbalis II –> crista iliaca sinistra
- Colon sigmoideum crista iliaca sinistra –> art. sacroiliaca dextra
- Rectum art. sacroiliaca dextra –> os coccygis
Syntopia
- Caecum et colon ascendens
Medially: intestinum tenue
- Flexura coli dextra
Superiorly: - hepar
- fundus vesicae biliaris
Posteriorly ren dexter
-Colon transversum
Superiorly:
* gaster
*pars superior duodeni
* pancreas
Inferiorly: intestinum tenue
- Flexura coli sinistra
Superiorly: - splen s. lien
- cauda pancreatic
Posteriorly: ren sinister - Colon descendens et sigmoideum
Medially: intestinum tenue
Rectum
Posteriorly:
* os sacrum
* os coccygis
Laterally: plexus venosus rectalis
Anteriorly in males:
* vesica urinaria
* Prostate
* ductus deferens
* glandula vesiculosa
Anteriorly in females
* uterus
* vagina
- Hepar
Main function; exocrine gland responsible for the production of bile
Secondary functions;
o Thermoregulation
o metabolism of carbohydrates, proteins and fats
o production of erythrocytes during the fetal period
- Margo Inferior - Thin, sharp border projecting downwards
- Area Nuda - bare, not covered by peritoneum
- Facies diaghragmatica
o Superior convex surface projected towards diaphragm
–> Lig. falciforme - divides the liver into lobus hepatis dexter et sinister
–> lig. cononarium - borders Area Nuda and forms the two attaching ligaments on either end –> lig. triangulare dexter et sinister
Facies Visceralis
* Inferior surface, directed towards the abdominal organs
* liver can be divided into 4 lobes
- The right lobe is bordered by the right sagittal groove
- The left lobe is bordered by the left sagittal groove
- The transverse groove lies between the two sagittal grooves
–> separates lobus quadratus and lobus caudatus
–> lobus quadratus lies anteriorly while lobus caudatus lies posteriorly
Tunica fibrosa and Tunica Serosa (peritoneum) cover the liver
–> The peritoneum covers the liver from 3 sides, but does not cover area nuda
–> It also forms the attaching ligaments of the liver, which can be divided into 2 groups:
- Ligaments extending to the diaphragm;
- Lig. Falciforme: b. diaphragm and upper surface of the liver
- Lig. Coronarium: from area nuda to diaphragm, with two attaching ends
- Lig. Triangulare Dexter et Sinister - Ligaments extending from porta hepatis towards the organs;
- Lig. Hepatogastricum: to curvatura minor gaster
- Lig. Hepatoduodenale: to the superior portion of duodenum
- Lig. Hepatorenale: to ren dexter
Nutrition entrance to liver and the formations within the sagittal grooves :
- Porta hepatis is located within the transverse groove and contains;
o Ductus hepaticus communis
o Vena portae heptis
o Arteria hepatica propria
o nerves and lymphatic vessels
Formations within the sagittal grooves;
* Fossa vesicae biliaris: depression for the gall bladder
* Sulcus venae cavae: groove for the vena cavae
* Fissura ligamentum teres: Lig. teres hepatis lies within
* Fissura ligamentum venosi: Lig. venosum
Holotopically:
regio hypchondriaca dextra
regio epigastrica
regio hypochondriaca sinister
Syntopically:
impressio cardiaca
impressio Oesophageale
impressio gastrica
impressio duodenalis
impressio colica
impressio renalis
impressio suprarenalis
Skeletopically: upper border on the right side:
–> intersection of linea medioclavicularis dextra and the 4th intercostal space
–> turns downwards towards the left, near the 5th intercostal space
The lower border:
intersection of linea axillaris media and 10th rib
curves along arcus costales
junction between cartilagines costarum 9th and 8th
border crosses regio epigastrica
reaches the left side where the cartilage of the 7th and 8th rib join
ends in 6th intercostal space
Posteriorly:
between 9th and 11th thoracic vertebrae
- Gall bladder and bile ducts
Vesica Biliaris:
storage of bile
- in fossa vesica biliaris, on the visceral side of the right lobe
It is composed of;
o fundus vesicae biliaris
o corpus vesicae biliaris
o collum vesicae biliaris
The mucus membrane lines the gallbladder and forms the mucosal folds
o Mucous glands are scattered in the mucosa
Tunica muscularis: one circular layer which forms musculus sphincter ampullae at the region of ampulla hepatopancreatica
Tunica Serosa (peritoneum) covers the gall bladder from the lower surface
Tunica adventitia covers the upper surface
There is no submucosa!
Bile pathway:
- Bile is excreted via ductus hepaticus sinister et dexter
- They join at the porta hepatis to form Ductus hepaticus communis
- Ductus hepaticus communis joins with Ductus cycticus form ductus choledochus
- Ductus choledochus runs along lig. hepatoduodenale together with portae arteria hepatica
- crosses the superior part of the duodenum and caput pancreas
- pierces the posterior wall of the pars descendens duodenum –> form plica longitudinalis duodeni
- with ductus pancreaticus to form ampulla hepatopancreatica –> opens into papilla duodeni major
- Pancreas
- Produces the pancreatic juice –> drains into the duodenum
Exocrine portion (pancreas is primarly an exocrine gland)
- Acinar cells: Enzymatic components (trypsinogen, chymotrypsinogen, elastase, pancreatic lipase….) (regulated by cholecystokinin)
- Centroacinar cells: bicarbonate (regulated by secretin)
Endocrine portion (only 2% of total mass)
- The cells of Langerhans (beta cells) produce insulin –> the blood stream for sugar metabolism
- Alpha cells produce glucagon –> raises the concentration of glucoce in blood stream –> causes the liver (hepar) to convert stored glycogen into glucose
- Lies transversely across the posterior wall of the abdominal cavity
- Peritoneum covers the anterior side = retroperitoneal organ
- Caput pancreatis – head of pancreas, curve of duodenum
- Corpus pancreatis – crosses the vertebral column
- Cauda pancreatis – reaches the visceral surface of the spleen
The body (corpus pancreatis) and the tail (cauda pancreatis) are TRIANGULAR on cross section –> 3 surfaces
1. Anterosuperior
2. Anteroinferior
3. Posterior
3 borders
- Superior
- Anterior
- Inferior
Ductus pancreaticus – through the pancreas
- joins the bile duct to form ampulla hepatopancreatica
- opens at papilla duodeni major
- Frequently there is ductus pancreaticus accessories
–> Excretes pancreatic juice from caput pancreatic
–> opens into the duodenum by papilla duodeni minor
Holotopically:
Regio epigastrica
Regio hypochondrica sinistra
Skeletotopically:
Caput pancreas at L2
Corpus pancreas crosses columna vertebralis at the level of L1
Cauda pancreatis at 10th costae
Syntopically:
- Caput pancreas surrounded by Duodenum and crossed by mesocolon transversum anteriorly
Posteriorly:
Vena cava inferior
Vena portae hepatis
Corpus and cauda pancreatis face:
Anteriorly
* Gaster
* Mesocolon transversum
Posteriorly
* Aorta abdominalis
* Ren sinister
Inferiorly
* Coils of jejunum
* Flexura coli sinistra
Cauda pancreatis reaches lien s. splen
- Splen
- Organ for the destruction of erythrocytes
–> Red pulp filtrates RBC’s - Produces leucocytes
–> White pulp synthesizes antibodies - Durin fetal life and shortly after it creates erythrocytes
Facies diaphragmatica – convex, smooth, directed upward to diaphragma
Facies visceralis – with hilum splenicum (entrance and exit of vessels and nerves)
Margo superior – projected forward
Margo inferior – more rounded, projected posteriorly
Tunica fibrosa surrounds the spleen (capsule)
Tunica serosa (peritoneum) covers from all sides –> intraperitoneal
–> forms 2 LIGAMENTS (= double fold of peritoneum)
1. Lig. Gastrosplenicum – from hilum splenicum to curvaura major (gaster)
2. Lig. Phrenicosplenicum – from facies diaphragmatica to diaphragm
Topography:
Holotopically: Regio hypochondriaca sinistra
Skeletotopically:
* Superior border at costae IX
* Hilum splenicum at costae X
* Inferior border at costae XI
Syntopically:
* facies diaphragmatica: Diaphragma
* Facies visceralis:
Gaster
Ren sinister
Glandula suprarenalis
Colon
Cauda pancreatis
- Peritoneum (epigastrium)
Bursa omentalis walls:
- S: heaps, diaphragm
- A: omentum minus, lig. gastrocolicum, lig. phrenicolicum, lig. gastorenale
- I: colon transversum, mesocolon
- P: peritoneum parietale, retroperitoneal organs
Foramen omentale walls:
- S: lobus caudatus
- A: lig. hepaticduodenale
- I: pars superior duodeni
- P: peritoneum parietale, inferior venae cava
- left lateral: lig. hepatorenale
Omentum majus:
–> curvatura major
- lig. gastrophenicum
- lig. gastrosplenicum
- lig. gastrocolicum
Omentum minus
- lig. hepatoduodenale
- lig. hepatogastricum
Recessus superior
recessus splenicus
Recessus inferior
Retroperitoneal organs:
->Covers only anterior side
- duodenum
- pancreas
- ren
- glandula suprarenalis
- empty vesica urinaria
- ureter
Mesoperitoneal:
Covers all but posterior side
- hepar
- vesical biliaris
Intraperitoneal:
Covers all sides
- oesophagus (pars abdominalis)
- gaster
- Splen s. lien
- serous covering of cavitas abdominalis
2 parts:
1. Peritoneum parietale
2. Peritoneum viscerale
–> between these parts is cavitas peritonealis with serous fluid to lubricate organs
- Between cavitas peritonealis and posterior abdominal wall is spatium retroperitoneale
- Peritonium (mesogastrium et hypogastrium)
Hypogastrium:
Female:
- Excavatio rectouterine
- Excavatio vesicouterina
Male: Excavatio rectovesicalis
Mesogastrium:
Canalis lateralis dexter (recessus subhepaticus, pelvis minor)
Canalis lateralis sinister (recessus subphrenicus, pelvis major)
Sinus peritonei dexter
Sinus peritonei sinister
–> divided by: Radix mesenterii from flexura duodenajejunalis L2 to iliocecal junction/art. sacroiliaca dextra
Recessus subphrenicus
Recessus subhepaticus (lig. falciforme divides into 2 parts) b. diaphragmatica and facies diaphragmatica hepatis
Recessus ileocaecales superior et inferior
recessus retrocaecales
Recessus intersigmoideus
Recessus duodenajejunalis superior et inferior
IQ: in mesogastrium in anterior abdominal wall peritoneum makes
plica umbilicalis mediana
plica umbilicalis lateralis and medialis
–> in between fossa supravesicalis, fossa inguinalis medialis and lateralis
- serous covering of cavitas abdominalis
2 parts:
1. Peritoneum parietale
2. Peritoneum viscerale
–> between these parts is cavitas peritonealis with serous fluid to lubricate organs - Between cavitas peritonealis and posterior abdominal wall is spatium retroperitoneale
- Peritoneum parietale continues into peritoneum viscerale and forms:
o Mesocolon
o Mesenterii
o Ligamenta
o Omenta
o Folds - Mesocolon and mesenterii are peritoneal folds that attach organs to the posterior abdominal wall
–> allow movement
–> contain BV, nerves and lymph vessels
o Mesenterii connects jejunum and ileum to the posterior abdominal wall by radix mesenterii
o Radix mesenterii passes obliquely downward from flexura duodenojejunale at 2nd LV to
ileocaecal junction
o Mesocolon transversum fix colon transversum
o Mesocolon sigmoideum fix colon sigmoideum
o Mesoappendix is for appendix vermiformis
Retroperitoneal organs:
Covers only anterior side
- empty vesica urinaria (preperitoneal)
- ureter
Mesoperitoneal organs:
Covers all but posterior side
- colon ascendes
- colon descendes
- rectum (middle 1/3)
- full vesica urinaria
- uterus
Intraperitoneal:
Covers all sides
- jejunum
- ileum
- caecum
- appendix
- colon transversum
- colon sigmoideum
- rectum (upper 1/3)
- tuba uterine
- Atrium et ventriculus dexter cordis
- atrium and ventriculus dexter pump blood through circulus sanguinis minor
- contain venous blood
- right part is directed forward
Atrium dextrum:
6 walls:
- Paries anterior
o auricular dextra
o mm. pectinate
- Paries lateralis
o mm. pectinati - Paries superior
o ostium venae cavae superioris by which vena cava superior opens into atrium
–> this vein returns blood from upper part of body (above diaphragm) - Paries posterior
o ostium venae cavae inferioris guarded by valvula venae cavae inferioris
–> by this valve during fetal life the blood from vena cava inferior is directed toward
foramen ovale
o sinus venarum cavarum
posterior part in right atrium between v. cava superior and inferior) - Paries medialis
o Formed by septum interatriale
o Depression fossa ovalis which is limited by limbus fossae ovalis
–> Site of foramen ovale in feta life for venous blood flow from right atrium to the left
atrium (pulmonary circulation could be passed by)
o foramina venarum minimarum
–> orifices of venae cordis minimae (returns blood directly from the layers of heart ́s wall)
- Paries inferior
o ostium atrioventriculare dextrum
–> communication between arium and ventricle
o ostium sinus coronarii of sinus coronarius cordis
–> opening between medial and posterior wall (below fossa ovalis)
–> protected by valvula sinus coronarii- sinus coronarius cordis returns venous blood from the wall of the heart
- lies in sulcus coronarius
Ventriculus dexter
- Ostium atrioventriculare dextrum (for inflow)
o Closed by valva atrioventricularis dextra. s. valvula tricuspidalis
3 cusps: formed by doubling endocardium (inner layer of the wall)
Cuspis anterior
Cuspis posterior
Cuspis septalis
o surrounded by annulus fibrosus, which is attached to one margin of each cusp
other 2 margins are free –> connected by chordae tendineae to mm. papillares
chordae tendineae prevent turning cusps into atrial direction
o extend from one cusp to 2 mm. papillares
o valva atrioventricularis dextra is closed in systole (contraction of ventricle), open in diastole
(relax of ventricle)
- Ostium trunci pulmonalis (for outflow)
o Closed by valva trunci pulmonalis
3 valvulae semilunares
formed by doubling of endocardium
bases are attached to anulus fibrosus, surrounding ostium trunci pulmonalis
free margins are directed upward, contain in its middle thickening nodulus
valvulae semilunaris
in between valves and wall of pulmonary trunk is sinus trunci pulmonalis
o conus arteriosus is the place where trunci pulmonalis starts
o in diastole sinuses are fulfilled by the blood and valves are closed
o valve trunci pulmonalis is open in systole
- Atrium ventriculus sinister cordis
- atrium and ventriculus sinister pump blood through circulus sanguinis major
- contain arterial blood
- left part backward (left rotation)
Atrium sinistrum:
(smaller, thicker, 5 openings)
- Paries anterior
o auricular sinistra
o mm. pectinati - Paries posterior
o ostia venarum pulmonalium (4x) from venae pulmonales
no valves - Paries medialis
o septum interatriale - Ostium atrioventriculare sinistrum is orifice between left atrium and left ventricle
Ventriculus sinistrum:
(3 times thicker than ventriculus dexter)
- Ostium atrioventriculare sinistrum (for inflow)
o closed by vavla atrioventricularis sinistra s. valvula bicuspidalis s. mitralis
cuspis anterior et posterior
both formed by endocardium
anchored to mm. papillares by chordae tendineae - Ostium aortae (for outflow)
o closed by valve aortae (structure similar to pulmonary valve)
3 valvulae semilunares with sinus aortae - Both openings surrounded by anulus fibrosus
- Trabeculae carneae + mm. papillares (2x) form chordae tendineae
o chordae tendineae connect mm. papillares with both cusps
- Wall structure of the heart
- Endocardium – inner layer, covers all structures of the wall
o Continuation of tunica interna s. tunica intima of great vessels
o Duplication of endocardium form heart valves
Atrium dextra
–> Valvula venae cavae inferioris
–> Valvula sinus coronorii
Ventriculus dexter
–> Valva atrioventricularis dextra s. valvula tricuspidalis
–> Valva trunci pulmonalis
Ventriculus sinister
–> Valva atrioventricularis sinistra s. valvula bicuspidalis s. mitralis
–> Valva aortae - Myocardium – middle layer, muscular layer 4x anuli fibrosis (skeleton where muscle fibers
are attached)
o Atrium: 2 layers - external circular (surrounds both atria)
2.internal longitudinal (separate each atrium)
o Ventriculus: 3 layers
1. External longitudinal (surround both ventricles)
2. internal longitudinal (surround both ventricles)
3. fibers from external and internal layers run toward apex where they form vortex
cordis
o middle circular (separate for each ventricle)
o Myocardium forms mm. papillares, mm. pectinati, trabeculae carneae
- Epicardium – external layer, formed by lamina visceralis pericardii serosi
o continues into lamina parietalis pericardii serosi at great vessels of heart
- Heart topography
skeletotopia:
- Upper border (basis cordis)
o along 3rd rib - Right border
o parallel to sternal margin 1,5 cm to the right
o from sternal junction of 3rd to 5th rib - Lower border
o obliquely from cartilage of 5th rib to intercostal space of 5th (here is apex cordis) - Apex cordis
o 5
th intercostal space
o 1,5 cm medially from linea medioclavicularis sinistra / 11 cm to the left from sternal margin - Left border
o apex cordis (5th intercostal space) to 3rd rib junction between cartilage and osseous part - Ostium atrioventricularis
o On the line extending from sternal junction of 3rd rib (on the left) to sternal junction 6th rib (on
the right) - Ostium aortae + Ostium trunci pulmonalis
o On the line extending from sternal junction of 3rd rib (on the left) to sternal junction of 4th rib (on the right)
–> Ostium aortae at level of 3rd intercostal space (behind sternum on midline)
–> Ostium trunci pulmonalis at level of 3rd rib sternal junction (on the left)
Auscultation sites of valves
- Aortic valve
o 2nd intercostal space, right site of sternum
- Pulmonary valve
o 2nd intercostal space, left site of sternum - Tricuspid valve
o 5th intercostal space, right site of sternum (on processus xyphoideus) - Bicuspid valve
o 5th intercostal space, 1,5 cm medially from linea medioclavicularis
Holotopy: mediastinum medium
Syntopia:
Anteriorly:
- Sternum
- Cartilagines costales
Posteriorly:
- Organs of mediastinum posterius
- Oesophagus
- BV, nerves
Laterally:
- Pleura parietalis pars mediastinalis
Inferiorly:
- centrum tendineum diaphragmae
Superiorly:
- great BVs
- Impulse conduction system
- Nodus sinuatrialis – between auricular dextra and ostium vena cavae superioris
a. generates impulses
b. spred throughout 2 atria and to nodus atrioventricularis - Nodus atrioventricularis – in septum interatriale beneath fossa ovalis, near cuspis septalis
a. Continues into fasciculus atrioventricularis - Fasciculus atrioventricularis
a. truncus (upper part) lies in fibrous part of interventricular sept
b. at upper muscular part of interventricular sept divides into crus dextrum (3) et sinistrum (2)
i. run till mm. papillares
Circulus sanguinis major = systemic circulation
Oxygenated blood from left ventricle –> aorta –> via arteries into capillary network of organs –> desoxygenated
blood –> vena cava inferior (legs and lower trunk) / vena cava superior (head, arm, upper trunk) –> atrium
dexter
Circulus sanguinis minor = Pulmonary circulation
Deoxygenated blood from right ventricle –> truncus pulmonalis –> a. pulmonalis dextra et sinistra –> capillary
network of lungs –> oxygenation in lungs –> venae pulmonales (4) –> atrium sinistra
- Heart valve projection space
a
- Cavitas nasi
regio olfactoria with the sense parts
regio respiratoria with respiratory epithelium (inferior concha) and olfactory epithelium (superior concha) mucosa which are separated by concha nasalis media
Paries superior
Lamina cribrosa Paries inferior
Palatum osseum
Paries lateralis
Facies nasalis maxillae
Os lacrimale
Concha nasalis inferior
Labyrinthus ethmoidalis
Lamina perpendicularis ossis palatini
Lamina medialis processus pterygoidei
Paries medialis (septum nasi)
Lamina perpendicularis ossis ethmoidalis
Vomer
Paries posterior
Facies anterior corporis ossis sphenoidalis
Choanae
Paries anterior
Os nasale
Apertura piriformis (os nasale, incisura nasalis maxillae)
Meatus nasi superior -> cellulae ethmoidales
Meatus nasi medius -> cellulae ethmoidales
Meatus nasi medius -> hiatus sinus maxillaris -> sinus maxillaris
Meatus nasi medius -> apertura sinus frontalis -> sinus frontalis
Meatus nasi inferior -> canalis nasolacrimalis -> orbita
Meatus nasi communis -> apertura piriformis
Meatus nasi communis -> cribrae ethmoidales -> fossa cranii anterior
Meatus nasi communis -> canalis incisivus -> cavum oris
Meatus nasopharyngeus -> apertura sinus sphenoidalis -> sinus sphenoidalis
Meatus nasopharyngeus -> foramen sphenopalatinum -> fossa pterygopalatina
Meatus nasopharyngeus -> choana -> basis cranii externa
- Larynx
- passage of air and the production of sound (voice box)
- The skeleton is formed by cartilagines larynges
- There are 3 single cartilages:
o Cartilago thyroidea
–> Consists of 2 plates, the anterior borders are fused with each other forming prominentia laryngea
(Adam’s Apple’)
o Cartilago epiglottica
–> Leaf shaped
–> projects obliquely upwards behind cartilago thyroidea
o Cartilago cricoidea
–> Ring shaped
There are 3 paired cartilages:
o Cartilago arytenoidea
–> Pyramidal in shape
–> at the upper border of the cricoid cartilage
o Cartilago corniculata
–> two small conical nodules
–> lie on top of cartilago arytenoidea
o Cartilago cuneiformis
–> placed in the posterior parts of the ary-epiglottic folds of the mucous membrane
Synovial joints:
Articulatio cricothyroidea
- Between cartilago cricoidea and cartilago thyroidea
- Flexio cartilago thyroidea –> movements of the vocal cord (frontal axis)
Articulatio cricoarytenoidea
- Between cartilago cricoidea and cartilago arytenoidea
- This articulation allows the space between the vocal cords to expand or narrow (vertical axis)
Syndesmoses:
Membrana thyrohyoidea
- Membrane between os hyoideum and the cartilago thyroidea
- Lig. cricothyroideum medianum is the thickest part
Lig. cricotracheale
- between cartilgo cricoidea and trachea
- Joins larynx to trachea
Cavitas larynges:
- From aditus laryngis to the lower border of cartilago cricoidea (–> continues into the trachea)
bordered by:
o epiglottis
o plica aryepiglottica
o incisura interarytenoidea
- cavity has an hourglass shape and is divided into 3 parts:
1. Vestibulum larynges (upper)- from aditus laryngis to plicae vestibulares
- Glottis (middle)
- between plicae vestibulares and plicae vocals
- At each side there is ventriculus larynges (acts as a resonator) - Cavitas infraglottica (lower)
- From plicae vocales to the entrance of trachea
The upper surface of cavitas laryngis is lined with stratified squamous epithelium:
- variable points becomes ciliated pseudostratified columnar epithelium
- Mixed mucous and serous glands are found in the lamina propria which covers membrana fibroelastica larynges
–> 2 areas can be distinguished;
- Membrana quadrangularis; Located in vestibulum laryngis
- The upper border forms plica aryepiglottica
- thicker lower border forms (false vocal cords) – lig. vestibulare - Conus elasticus; Located in cavitas infraglottica
- The thick upper border forms (true vocal cords) – lig. vocale
Plica vestibulares: The mucous membrane that covers lig. vestibulare
- forms Rima vestibuli: The narrow distance between the right and left folds
Plica vocalis: The mucous membrane that covers lig. vocale
- forms rima glottidis s. rima vocalis: The narrow space between both plicae vocalis
The voice is formed by the vibrations of the vocal folds made by an air stream expelled from the lungs
Musculi laryngis, 2 primary muscles:
M. cricothyroideus
- Moves art. cricothyroidea: flexio cartilago thyroidea –> stretch
the vocal cords
M. Vocalis
- Control the tension in the vocal cords
PLUS the extrinsic muscles such as suprahyoid (digastrica, mylohyoid, stylohyoid, genihyoid = elevation), (stylopharungeus, elevate) and infrahyoid muscles (omohyoid, sternohyoid, thyrohyoid)
Holotopically: cervical region
Skeletopically: C4– 5 to C6– 7
Synoptically:
Anteriorly:
- Isthusmus glandulae thyroideae
- mm. recti colli
- fascia colli
- subcutis and cutis
Posteriorly: laryngopharynx
Laterally:
- BV and nerves
- lobuli glandulae thyroideae
- Trachea
- 9-15 cm long tube, 2- 2.5 cm in diameter
- from Larynx –> bifurcation tracheae
- carina tracheae
- 16- 20 cartilagines tracheales
o reinforce trachea
o anteriorly: ligg. anularia
o posteriorly: paries membranaceus
–> connective tissue and m. trachealis - tunica mucosa
o folliculi lymphatici tracheales
o glandulae tracheales - tunica submucosa
- tunica adventitia
Holotopia:
- Regio colli
- mediastinum superius
Skeletotopia: C6-7 –> T4-5
Syntopia:
regio colli
- anteriorly:
> mm. recti colli
> fasciae colli
> subcutis, cutis
> isthmus glandulae thyroidea
- laterally:
> BV, nerves
> lobi glandulae thyroidea
- posteriorly:
> oesophagus
mediastinum superius
- anteriorly: thymus
- laterally: pleura mediastinalis
- posteriorly: oesophagus
- Arbor bronchialIis et arbor alveolaris
(Bronchus principalis dexter et sinister
- start at T4-5
bronchus principalis dexter:
o wider, shorter (2.5 cm long)
o continuous with course of trachea
o enters lung at Th 5
o divides into 3 bronchi lobares
bronchus principalis sinister:
o smaller, longer (5 cm long)
o divides into 2 bronchi lobares)
Entering pulmo: form arbor bronchialis –> arbor alveolaris
Arbor bronchialie (air conducting portion)
- Bronchus principalis dexter et sinister
- Bronchus lobaris
> Dexter: 3
> Sinister:2
- Bronchus segmentalis
- Bronchus intersegmentalis
- Bronchiolus
Arbor alveolaris (respiratory portion)
- Bronchiolus respiratorius
- Ductus alveolaris
- Sacculus alveolaris
- Alveoli pulmonis – gas exchange
Functional unit: acinus pulmonalis
- Pulmones topography
Holotopia cavum thoracis; on both sides of mediastinum
Syntopia
- facies costales: sulci costales
- facies diaphragmatica: to diaphragm
- facies mediastinalis: depressions of heart and BV
Skeletotopia:
apex pulmonis
- lies behind mm. scaleni (1-3cm above clavicula)
- posteriorly: proc. spinosus C7
- anterior border:
> apex pulmonalis
> obliquely downward, forward
> crosses art. sternoclavicularis from
behind
> anterior borders approach
> descend from costae 2–4
> below curves:
left lung
- curve along 4th costae
> linea parasternalis sinistra (cardiac notch)
> downward
> linea medioclavicularis/6th costae
right lung: > 4th costae > linea parasternalis dextra/upper margin of 6 th costae > coninues to lower border
Lower border:
- linea medioclavicularis/6th costae
- linea axillaris anterior/7th costae
- linea axillaris posterior/9th costae
- linea scapularis/10th costae
- linea paravertebralis/proc. transversus Th 11
posterior border:
along linea paravertrabralis –> apex
- Pulmones structure
essential organ for respiration
- gas exchange between inhaled air and blood
- conical shape
- apex pulmonis
> rounded
> extends upwards into root of neck
- basis pulmonis
> broad concave
> on surface of diaphragm
4 surfaces:
- facies costales
* smooth & convex
* projects into inner surface of ribs
- facies diaphragmatica
* towards diaphragm
* concave
- facies interlobaris
* numerous surfaces between lobes
- facies mediastinalis
* towards mediastinum
- hilum pulmonis
- bronchus principalis, a. pulmonalis, vv. pulmonales, nerves, lymph vessels –> form radix pulmonis (root of lung)
* On the right side: highest structure is bronchus principalis
* On left side: highest structure is a. pulmonalis
Each lung has 2 borders:
- margo inferior
* thin, sharp
* separates facies costales et facies mediastinalis from facies diaphragmatica
- margo anterior
* thin, sharp
* right lung: almost vertical
* left lung: incisura cardiaca pulmonis sinistra
> limited below: lingual pulmonis sinistri
right lung: 3 lobes
1. lobus superior
2. lobus medius pulmonis dextri
3. lobus inferior
left lung: 2 lobes
1. lobus superior
2. lobus inferior
- fissura obliqua
> both lungs
> posterior part: Th 3 –> downward & forward over facies costales –> 6th costae (cartilage bone-connection) - fissura horizontalis pulmonis dextri
> only right lung
> linea axillaris media –> horizontally along 4th costae to sternum
> separates superior and middle lobe
lobes consist of conical segmenta bronchopulmonalia:
- anatomical, physiological, surgical unit
- base: projected to external surface of lung
- apex: to hilum pulmonalis
- center: arteria et bronchus segmentalis
- branches of veins –> lie in connective tissue surrounding the segment
- Right lung: 10 segments
- Left lung: 9 (0r 10) segments
- Each segment consists of lobuli
Pulmo dexter - lobus segments
lobus superior
- segmentum apicale
- segmentum posterius
- segmentum anterius
lobus medius
- segmentum laterale
- segmentum mediale
lobus inferior
- segmentum superius
- segmentum basale mediale
- segmentum basale anterius
- segmentum basale laterale
- segmentum basale posterius
Pulmo sinister - lobus segments
lobus superior
- segmentum apicoposterius
- segmentum anterius
- segmentum lingulare superius
- segmentum lingulare inferius
lobus inferior
- segmentum superius
- segmentum basale mediale
- segmentum basale anterius
- segmentum basale laterale
- segmentum basale posterius
- Pleura
- pleura pulmonalis s. pleura visceralis
o covers the surface of the lung
o goes into the fissures between lobes - pleura parietalis
a. pars costalis
- lines inner surface of ribs and intercostal spaces
b. pars diaphragmatica
- covers superior surface of diaphragm
c. pars mediastinalis
- sagitally from sternum to columna vertebralis
At apex pulmonis pleura parietalis arches over the lung as cupula pleurae
Cavitas pleuralis between pleura pulmonalis and pleura parietalis
–> fluid decreases friction between pleuras
pleura parietalis pars mediastinalis: the continuation of the costal and diaphragmatic pleura of each side that passes from the vertebral column and sternum covering the sides of the mediastinum.
recessus costodiaphragatica
o horizontally between pars costales and pars diaphragmatica
recessus costomediastinalis
o vertically behind sternum between pars costalis and pars mediastinalis
recessus vertebromediastinalis
o vertically in front of columna vertebralis between pars costalis and pars mediastinalis
recessus phrenicomediastinalis
o sagitally in left pleural cavity between pars diaphragmatica and pars mediastinalis
- Mediastinum
(space between two pleural cavities)
Bordered by:
anteriorly – sternum
Posteriorly – vertebra thoracici
Laterally – pleura parietals pars mediastinalis
Inferiorly – diaphragm
- Connects neck region via apertura thoracis superior
- Spatium retropharyngeum
- Spatium parapharyngeum
- Mediastinum superius
a. Plate from angulus sternum to 4th thoracic vertebra —> plana transversalia
i. Seperates mediastinum superius from mediastinum inferius- Thymus
- Trachea
- Oesophagus
- BV, nerves, lymph vessels
- Mediastinum inferius
a. Anterius
i. Between sternum and pericardium- BV, lymph vessels
b. Medium
i. Cor and pericardium
c. Posterior
i. Between pericardium and columna vertebralis
- Oesophagus
- BV, nerves, lymph vessels
- Ren structure, topography
Extremitas superior
Extremitas inferior
Margo lateralis
Margo medialis
Hilum renalis
Capsula adiposa (protects from concussion and cooling, around kidney)
Capsula fibrosa (dense CT covering)
Fascia renalis surrounds capsula adipose and it consists of 2 plates: Both plates are fused together at upper
extremity and laterally. Medially and inferiorly it is open for ureter and BV.
1. Lamina prerenalis, (anterior lamina) –> Medial over kidney‘s surface, renal vessels, aorta abdominalis, v. cava inferior
2. Lamina retroreanlis, (posterior lamina) –> Medial connected to Columna vertebralis
* Ineriorly plates do not connect and continue into retroperiotoneal rissue.
* Peritoneum covers kidneys from the anterior side (=retroperitoneal organ)
Cortex
- Soft, granular, 4-5mm wide
- Parts extend into medulla as columnae renales
Medulla
- 12-15 pyramides renales (base towards the cortex), columnae renales between pyramids. Several apices fuse to form papilla renalis
Gl. Suprarenalis
Hilum renale
Sinus renalis (pelvis renalis is located here)
Pelvis renalis (togerher with fat and BV)
Calyces renales
Foramina papillaria (on the renal papilla)
- Surrounded by: calces renales minors, which unite to form 2-3 calces renales majors. These fuse and form pelvis renalis.
Finestructure:
Corpusculum renis
Portio nephroni proximalis
Ansa nephroni
Portio nephroni distalis
Pars intercalate
Skeletopia
Ren dextrum (lower)
- Th12 – L3
- Costa 12 crosses upper third
- L2 Hilium
Ren sinistra (higher)
- Th11 – L2
- Costa 12 crosses middle third
- L1 Hilium
Syntopia
Facies posterior
- M. psoas major
- Pars lumbalis diaphragmae
- M. quadratus lumborum
Facies anterior ren dexter
- Glandula suprenalis
- Hepar
- Pars descendens duodeni
- Colon (flexura dextra)
- jejunum
Facies anterior ren sinister
- Glandula suprenalis
- Splen s. Lien
- Gaster
- Pancreas
- Colon descendens
- jejunum
Holotopically
Regio lateralis
- Vesica urinaria
s. cystis
Located in the subperitoneal space
Apex vesicae
Corpus vesicae
Fundus vesicae
–> consists 3 openings:
Ostium ureteris dextrum et sinistrum
Ostium urethrae internum
** Openings border Trigonum vesicae
** Plica interureterica is between ostium ureteris dextrum et sinistrum
Empty vesica urinaria
- Behind symphysis pubica
- Tunica serosa posterior and lateral sides (lies preperitioneally), upper surface covered by peritoneum
parietale
Distended vesica urinaria
- Directed upward and forward above symphysis pubica, Oval-shape.
- Tunica serosa covers also apex vesicae (lies mesoperioneally)
Histology:
• Tunica mucosa
• Tela submucosa
• Tunica muscularis
• Tunia adventitia (anterior)/ serosa
• Plicae vesicae (empty)
• Gll. Vesicales
• 3 muscle layers ( m. detrusor vesicae)
- external and internally longitudinal
- middle layer circular (m. sphincter vesicae)
Topography:
Holotopia
- Pelvis minor
Skeletopia
- Behind symphsis pubica
Syntopia
males
- Anterior: symphysis pubica
- Posterior ductus:
* deferentes dextra et sinistra
* vesiculae seminales dextra et sinistra
* rectum
* excavatio rectovesicales with coils of ileum and part of colon
* sigmoidem
- Lateral: plexus venosus
- Inferior: prostate
females
- Anterior: symphysis pubica
- Posterior: uterus, excavatio vesicouterina
- Lateral: plexus venosus
- Inferior: vagina
- Ureter
Convey urine from ren to vesica urinaria. ~ 30cm long. Commences pelvis renalis ( = munuaisallas).
Descendens along posterior abdominal wall, anteriorly to m. psoas major –> crosses linea terminalis, continues
into pelvis minor.
- Male: crosses ductus deferens
- Female: passes between layers of lig. latum uteri together with lig. cardinale uteri and a. uterina
3 parts
1. Pars abdominalis (in retroperitonel space)
Ureter dexter
- Anterior upper third
** Pars descendens duodeni
- Middle third
** A. et v. testicularis (male)
** A. et. v. ovarica (femle)
- Lower third
** Radix mesenterii
Ureter sinister
- Anterior upper third
** Flexura duodenojejunalis
- Middle third
** A. et v. testicularis (male)
** A. et. v. ovarica (female)
- Lower third
** Mesocolon sigmoideum
- Pars pelvina, in pelvis minor
- Linea terminalis until vesica urinaria - Pars intramuralis, transverses the wall of the urinary bladder
- Through wall of vesica urinaria. Opens into its fundus by ostium ureteris
Narrowings:
Upper narrowing - Hilum renale/exit from renal pelvis
Middle narrowing - Level of linea terminalis/crossing a. iliaca
communis or a. iliaca dextra
Lower narrowing - Wall of vesica urinaria
Histology
• Tunica mucosa
• Tela submucosa (not well developed)
• Tunica muscularis
- Upper 2/3 internal longitudinal, external circular
- Lower 1/3 external and internal longitudinal, middle circular
• Tunica adventitia (from all sides)
• Transitional epithelium
• Gll. Urtericae (glandulae?)
• Situaited retroperitoneally
- Urethra masculina et urethra feminina
Masculina:
- Eliminating urine and sperm, ~20 cm
- From Ostium urethrae internum (vesica urinaria) to ostium urethrae externum
Pars prostatica
- Through prostata from base to apex
* Colliculus seminalis
* Utriculus prostaticus
–> Ductus ejaculatorii enter on colliculus
seminalis and prostatic ducts on both
sides
Pars membranacea
- From Apex prostea to bullbus penis.
- Transverse the pelvis floor.
* M. sphincter urethrae
Pars spongiosa
- From Pars membranacea to Ostium
urethrae externum.
- Located in corpus spongiosum penis.
- At bulbus penis ductus glandulae bulbourethralis opens into the urethra
Narrowings
- Upper narrowing: Ostium urethrae internum
- Middle narrowing: Pars membranacae
- Lower narrowing: Ostium urethrae externum
Enlargements
- Upper enlargement: Pars prostacia
- Middle enlargement: Regio bulbus penis
- Lower enlargement: End of pars spongiosa (fossa navicularis urethrae)
Curves
- Curvatura infrapubica: Below symphysis pubica
* Transition from Pars prostatica to pars membranacea
- Curvatura prepubica: Uncostant curve. In the middle of pars spongiosa. Disappears when Penis is
lifted
• Tunica mucosa
- Lacunae urethrales
- Gll. Urethrales open in lacunae
- Fossa navicularis region valvula fossae navicularis
• Tunica muscularis
- presented in Ostium urethrea internum (m. sphincter vesicae)
- Pars membranacea (m. sphincter urethre)
Feminina:
- 3-5 cm
- Extends from ostium urethrae internum
- Passes through diaphgrama urogenitalis
- Terminates by ostium urethrae externum in vestibulum vaginae
- Behind symphysis pubica
- Embedded into anterior wall of vagina
Histology
• Tunica muscosa
Lacunae urethrales Gll. Urethreales
• Tunica muscularis
External circular layer
Internal longitundinal layer
• Tunica adventita
- Testis et epididymis structure
o Paired glandular organ producing spermatozoa and sex hormones
o Oval shape, 4-4,5 cm long and weighs about 20-30g
o Situated into the scrotum in the saggital plane.
o Poles
o Extremitas superior (17)
o Extemitas inferior (18)
o Surfaces
o Facies lateralis (19)
o Facies medialis
o Margins
o Margo anterior (21)
o Margo posterior (close to the epididymis) (22)
o Tunica albuginea (24)
connective tissue capsule of the testis
o Mediastinum testis (25)
connective tissue mass projecting into the interior of the testis from the posterior margin
of the tunica albuginea
o Septula testis (26)
Connective tissue partitions radiating out from the mediastinum to the tunica albuginea,
divide into lobules
o Parenchyma of testis (27)
specific testicular tissue made up of seminiferous tubules
o Lobuli testis (28)
Compartmentalized lobules of testicular parenchyma formed by the septa, 200-300
o Tubuli seminiferi contorti (29)
convoluted tubules where spermatogenesis take place
o Tubuli seminiferi recti (30)
short straight tubules extending from the convoluted seminiferous tubules to the rete
testis
o Rete testis (31)
Network of canals within the mediastinum testis, they connect the straight seminiferous
tubules with the efferent ductules
o Ductuli efferentes testis (30)
ductulus between the rete testis and the duct of the epididymis
epididymis:
o Caput epididymis (2)
- upper enlarged part, ductuli efferentes testis enters
o Corpus epididymis (3)
- central part, consists of ductus epididymis. (6)
o Cauda epididymis (4)
- lower part, consists of ductus epididymis. (6)
o Ductus epididymis (6)
- continuous with ductus deferens(13)
o Ductus deferens (13)
- spermatic duct between the epididymis and the spermal
vesicle.
- Testis et epididymis coverings
o Tunica vaginalis testis:
- Lamina visceralis; fuses with tunica albuginea
- Lamina parietale
- between layers is a space with serous fluid, sinus epididymidis
o Fascia spermatica interna (continuation of fascia transversalis)
o Musculus cremasterica
o Fascia cremasterica
o Fascia spermatica externa (continuation of fascia abdominalis superficialis)
o Tunica dartos
o Cutis
There is a space between the layers and a pouch at the lateral surface
- sinus epididymis.
- Ductus deferens, funiculus spermaticus
Topographical division:
o Pars scrotalis
- behind the testis in the scrotum
o Pars funicularis
- extremitas superior testis anulus inguinalis superficialis
o Pars inguinalis
- passes through the inguinal canal
o Pars pelvina
- anulus inguinalis profundus ampulla ductus deferentis.
Ampulla ductus deferentis fuses with ductus excretorius vesiculae seminalis and form ductus ejaculatorius.
Ductus deferens histology
o Tunica mucosa:
- Arranged in 3-5 longitudinal folds
o Tunica muscularis:
- Arranged in three smooth muscle layers; external and
internal layers are longitudinal and the middle layer is
circula.
o Tunica adventitia
- Formed by loose connective tissue
Funiculus spermaticus
o A bundle formed by
- ductus deferens (pars scrotalis, pars funicularis and pars
inguinalis)
- blood vessels, nerves and lymphatics in the center
which are surrounded by covering of the testis
from periphery
fascia spermatica interna
m. Cremaster
fascia cremasterica
fascia spermatica externa
o Extends from cauda epididymis to anulus inguinalis profunda
o Contents:
- Parts of ductus deferens: pars scotalis, pars funicularis and pars inguinalis.
- Blood vessels and nerves
- Covering of the testis, epididymis and ductus deferens:
fascia spermatica interna
m. Cremaster
fascia cremasterica
fascia spermatica externa
- Vesicula seminalis, prostata, glandula bulbo urethralis
o Paired, placed posteriorly to the base of the urinary bladder
o Situated extraperitoneally
o Secretes fluid to be added to the secretion of the testis.
o Each sac is pyramidal in shape and consists of a single convoluted tube, its end becomes constricted
into ductus excretorius.
o Ductus excretorius and ampulla ductus deferentis joins to form ductus ejaculatorius.
o Ductus ejaculatorius passes through the prostata and opens on colliculus seminalis into urethra.
Prostata:
- lies on diaphragma urogenitale
o Partly glandular and partly muscular body
o Situated in the pelvic cavity around the beginning of the urethra behind
symphysis pubica.
o The prostatic part of the urethra runs through the prostata.
o Has two parts: apex prostatae et basis prostatae
o Has right and left lobes: lobi prostatae dexter et sinister
Between the lobes anteriorly is isthmus prostatae
Surfaces:
Facies anterior
Facies posterior
Facies inferolateralis dexter et sinister
Prostata parenchyma
o Consists of glands with ductuli prostatici
- open into the prostatic part of urethra. (24)
o The secretion of these glands forms sperm together with secretions of the
testis, the seminal vesicles and the bulbourethral glands.
o Substantia muscularis: smooth muscular tissue in the central part around
the urethra.
Prostata topography
Holotopia: Pelvis minor
Sceletotopia: Behind symphysis pubica
Syntopia: Posterior rectum
Lateral venous plexus
Superior fundus vesicae urinariae
Inferior diaphragm urogenitalis
Glandula bulbourethralis
o Two small, round and lobulated bodies, about the size of a pea, placed in the perineum.
o Lies close above bulbus penis
o The excretory duct, ductus glandulae bulbourethralis, of the gland opens at the beginning part of pars
spongiosa urethrae
o The secret of the gland is added to spermatozoa and secrets of the rest of the glands to form sperm.
- Organa genitalia masculina externa
Penis
Bodies:
o Corpus cavernosum penis (8)
- cavernous body divided into two halves by the septum of the penis, serves only for erection.
Their posterior ends are sharp crura penis, and they fuse with os pubis and os ischii.
M. ischiocavernosus = m. erector penis
o. ramus ossis ischii
i. tunica albuginea clitoridis
f. erectio clitoridis
o Corpus spongiosum penis (9)
- urethra passes through it and the anterior expanded end forms glans penis.
- The posterior end lies between bulbus penis.
M. bulbospongiosus = m. ejaculatorius seminis
o. centrum tendineum
i. fascia clitoridis
f. narrowing of vestibulum vaginae
Portions:
o Pars fixa penis
- includes radix penis and upper part of the corpus penis, situated below the perineum and is
fused with os pubis and os ischii
o Pars mobilis penis
- rest part of the penis
Parts:
o Radix penis (28)
- covered by skin and muscles, fixed to the inferior part of the subpubic angle.
o Corpus penis (29)
- movable part of penis and has two subparts: dorsum penis (anterior surface) and facies
urethralis (posterior or lower surface)
o Glans penis
- expanded end of the corpus spongiosum penis.
Corpora cavernosa
o Covered by tunica albuginea coporum cavernosum (11)
o Forms septum penis (13)
o From tunica albuginea into bodies enter trabeculae
corporis cavernosi (14)
o Cavernae corporis cavernosi (16) bloodfilled spaces
Corpora spongiosum
o Covered by tunica albuginea corporis spongiosi (12)
o Trabeculae corporis spongiosis (15)
o Cavernae corporis spongiosi (17) blood-filled space
Above tunica albuginea are
o Fascia penis profunda (21)
o Fascia penis superficialis (20)
o Subcutis(only present in the corpus penis region) and cutis
Penis structure
o The skin is thin and can slide across the penis, but it is firmly attached to the glans penis.
o At the region of the glans penis the skin forms a fold (foreskin) – preputium penis, which embraces the
glans penis.
o At the lower surface the glans penis and the foreskin are connected by the vertical fold (frenulum) –
frenulum preputii.
Glans
*Corona glandis (2)
- Rounded border
*Collum glandis (4)
- neck of glans, constricted portion behind the corona.
*Septum glandis (3)
- median part of the glans
-> Through the corpus spongiosum runs the spongy part of urethra, terminating on the glans penis by a
slit-like external orifice of the urethra.
Scrotum
o Cutaneous and muscular pouch
o Contains testis, epididymis and commencement of funiculus spermaticus.
o Consists of 2 layers
Layers:
1. Cutis (1) - outer
- Very thin skin generally thrown into fold. Contains sebaceous glands and hair
2. Tunica dartos (4) - inner
- Layer of connective tissue with elastic fibres and smooth muscles
o Septum scroti (3)
- Divides the scrotal pouch into two cavities
- Ovarium
- Lies in peritoneal cavity, but is NOT covered by peritoneum, pelvis minor. ~ 5-8 g, 3-5 cm.
- Almos vertically positioned ovarium is attached to uterus by lig. latum uteri
- Extremitas tubaria et uterina
- Facies medialis et lateralis
- Margo liber –> free, convex, looking backward
- Margo mesovaricus
- Is attached to the posterior part of lig. latum uteri by mesovarium
- Mesovarium is a fold of peritoneum
- Between 2 layers of mesovarium is blood vessels and nerves, which pass to hilum ovarii
Ovarium is fixed by 3 strucrutes:
1. Lig. ovarii proprium
* from ovarium to uterus , lies within lig. latum uteri
2. Lig . Suspensorum ovarii
* From ovarium to lateral wall of pelvis minor
* Contains blood vessels and nerves
3. Mesovarium
* Part of lig. latum uteri
- Surface is coverd by tunica albuginea
- Medulla ovarii
- Nerves, BV, lymph vessels
- Cortex ovarii
- 50 000 - 80 000 follicles in each organ
- Folliculi ovarici vesiculosi mature periodically once in 28 days (after puberty to the age of 45)
- Corpus luteum –> corpus albicans
- Tuba uterina
s. salpinx
~ 10-12 cm long
Extends from lateral wall of pelvis minor to uterus
Intraperitoneal in the upper part of lig. latum uteri (mesosalpinx, which is a part of lig. latum uteri,
surrounds tuba uterine)
2 openings:
1. Ostium abdominale tubae uterinae
Communicates with cavitas peritonealis
2. Ostium uterinum tubae uterinae
Communicates with cavitas uteri
4 parts:
1. Infundibulum tubae uterinae
Abdominal end. Opens to cavitas peritonealis
Surrounded by 1-1,5 cm long fimbriae tubae uterinae
o One of them is fimbria ovarica reaching extremitas tubaria ovarii
- Ampulla tubae uterinae
Oval shape enlargement, place for fertilization - Isthmus tubae uterinae
Narrow part close to uterus - Pars uterinae
Penetrates wall of uterus and opens to cavitas uteri by ostium uterinum tubae uterinae
Tunica mucosa
o Ciliated epithelium, producing fluid flowing towards uterus . Mucosa has plicae tubariae folds.
Tunica muscularis
o Inner circular muscle layer
o Outer longitudinal muscle layer
o Peristaltic movement for oocyte transport to uterus and antiperistaltic movement for spermatozoa
Tela subserosa
o Loose connective tissue
Tunica serosa
o Intraperitoneal covering, except at mesosalpinx, where perotineum folds to formate passway for blood
and lymph vessels and nerves.
- Uterus
s. metra
Hollow pear-shaped muscular organ, 7-8 cm in lenght and 40-50 g in weight
Mesoperitoneal organ
Syntopia
o Anteriorly: vesica urinaria, Excavatio vesicouterina
o Posteriorly: rectum, Excavatio rectouterina
3 parts:
1. Fundus uteri
Above ostium uterinum tubae uterinae dextrae et sinistrae
2. Corpus uteri
2 walls:
i. Facies vesicalis - facing vesica urinaria
ii. Facies intestinalis, separated from rectum by coils of intestinum tenue
Lower part is narrow, isthmus uteri
3. Cervix uteri
Lower portion lies in vagina, divided into:
i. Portio supravaginalis cervicis – upper part above vagina
ii. Portio vaginalis cervicis – lower part inside vagina
Margo uteri dexter et sinister (border of uterus)
o Lig. latum uteri starts from the border and extends to pelvic walls
Cavitas uteri
o Antero-posteriorly flattened, sagittally triangular
o Basis cavi uteri, between ostium uterinum tubae uterinae d. et s.
o Apex cavi uteri, projects down, continues as canalis cervicis uteri
o Canal opens into vagina by ostium uteri externum
bordered by:
labium anterius
labium posterius
(Tunica mucosa s. endometrium
Lining of cavitas uteri et canalis cervicis uteri
Glandulae uterinae et plicae palmatae in anterior and posterior walls of canalis cervicis uteri
Endometrium, except lamina basalis endometrii, is desquamated during mestruation
Tunica muscularis s. myometrium
Internal longitudinal, middle circular, outer longitudinal muscle layers
Tunica serosa s. perimetrium
Mesoperitoneal covering by peritoneum)
- Uterus fixating apparatus of uterus
Structures fixing the uterus:
M. levator ani:
- M. pubococcygeus
o. ramusinferiorossispubis
i. os coccygis - M. puborectalis –> fibers laterally from m. pubovaginalis toward rectum
o.symphysispubica
i. rectum - M. iliococcygeus
o. spinaischiadica
i. os coccygis
f. stabilies pelvic organ
Lig. teres uteri
o Starts from upper part of uterus lies between layers of lig. latum uteri through canalis
inguinalis reaching mons pubis
Lig. latum uteri
o Dublication of peritoneum in planum frontale
o from margo uteri to walls of cavitas pelvis
o Superior part surrounds tubae uterinae , inferior part fuses with perineum
o Has topographical subdivision into 3 parts:
1. Mesosalpinx – surrounding tubae uterinae
2. Mesovarium – attaching to margo mesovaricus ovarii
3. Mesometrium – lower portion, laterally to uterus
Lig. cardinale uteri s. lig. transversum cervicis
o from cervix uteri to lateral wall of pelvis minor
Lig. pubocervicale
o from cervix uteri to fundus vesicae urinariae and symphysis pubica ossis pubis
Lig. Rectouterinum
o from cervix uteri to rectum and os sacrum
o in plica rectouterina
Normal position is anteflexio 70 – 100 ̊ and anteversio 90 – 100 ̊.
- Vagina
~8-12 cm in lenght, bordered by uterus et ositum vaginae
Ostium vaginae
o Partly closed by hymen (mucosal fold)
o After first coitus hymen is broken and becomes caranculae hymenales
Paries anterior vaginae
Paries posterior vaginae
Upper parts of vagina surrounds portio vaginalis cervicis uteri
o Between portio vaginalis cervicis uteri and the inner surface of vagina wall is Fornix vaginae
Posterior part of Fornix vaginae is higher
Mucosa on the inner surface of vagina forms rugae vaginales
o medial part higher to lateral part
In paries anterior et paries posterior these rugae vaginales form two longitudinal colums – columna
rugarum anterior et columna rugarum posterior
Tunica muscularis
Smooth muscles fibers, with inner circular and outer longitudinal layers
Tunica adventitia
Loose connective tissue connecting to surrounding organs
- Organa genitalia feminina externa
s. vulva s. pudenda feminina
Mons pubis
Round eminence anteriorly to symphysis pubica, superiorly to labia majora
Triangular in shape, adipose tissue, becomes covered by hair after puberty
Labium majus pudendi dextrum et sinistrum
Longitudinal cutaneous folds, sagitally downwards and backwards from mons pubis
Rima pudendi between labia majora
Outer surface is pigmented and has hair covering
Inner surface is smooth non-pigmented with sebaceous glands
Glandula vestibularis major dextra et sinistra
o Located in the base of labia majora between musculi perinei
o Ducts open to lateral part of ostium vaginae
Labium minus pudendi dextrum et sinistrum
Sagittal cutaneous folds between labia majora
Posterior ends join at midline
Each anterior end divides to 2 portions:
1. Preputium clitoridis – fuses above glans clitoridis
2. Frenulum clitoridis – fuses below glans clitoridis
Glandulae vestibulares minores in the inner surface
o Function is to moisten vestibulum vaginae
Vestibulum vaginae
o Cleft between labia minora pudendi, behind glans clitoridis
o 2 openings in vestibulum vaginae:
1. Ostium urethrae externum
2. Ostium vaginae
Bulbus vestibule
Unpaired organ, similar to corpus spongiosum penis with erectile tissue with venous blood
Two lateral portions around ostium vaginae
o Median portion between glans clitoridis and ostium urethrae externum
Clitoris
Similar to corpora cavernosa penis
Erectile tissue with significant amount of nerve endings
It has 3 parts:
1. Crus clitoridis dexter et sinister
Connected to ramus inferior ossis pubis
2. Corpus clitoridis
3. Glans clitoridis
Beneath anterior connection of
labium majus, hidden by preputium clitoridis
M. ischiocavernosus (=common name) in females: m. erector clitoridis
o. ramus ossis ischii
i. tunica albuginea clitoridis
f.erectio clitoridis
M. bulbospongiosus (=common name)
in females: m. sphincter vaginae
o. centrum tendineum
i. fascia clitoridis
f.narrowing of vestibulum vaginae
- Tunicae bulbi
3 tunicas:
tunica fibrosa consists of 3 parts:
- cornea – transparent
- limbus corneae – lateral border
- sclera – white part of eye
lamina cribrosa sclerae – for nerves, vessels
sulcus sclerae with sinus venosus sclerae (Schlemm ́s canal)
tunica vasculosa consists of 3 parts:
- iris
- corpus ciliare
- choroidea – a thin, highly vascular part, attached to the inner surface of sclera
Iris- controls the amount of light entering the eye, has an opening –pupilla. Contains the smooth muscle fibers controlling the size of pupilla.
** M. sphincter pupillae (inner)
** M. sphincter pupillae (outer)
** M. dilator pupillae (outer)
–> Also contains pigment melanin
- Corpus ciliare – is responsible for accommodation, it lies as a flat ring (next to iris), but looks triangular in cross section
Orbiculus ciliaris – contains smooth muscle fibers – m. ciliaris
Corona ciliaris with processus ciliares – from them to the lens extend thin fibers fibrae
zonulares
Capillaries of the processus produce solution of eye – humor aqueous
Tunica interna s. retina consists of 2 parts:
- Pars optica
- Pars caeca
- (pars ciliaris & pars iridiaca)
Pars optica contains:
Rods (~100 million) for night vision, loss of them causes night blindness
Cones (~6 million) for different colors and day vision
From retina starts the optic nerve – discus nervi optici
(“the blind spot”), also entrance of blood vessels
“the fundus of the eye” – the whole surrounding area of the back eye
Macula lutea, 4mm laterally to the disc with a small depression in it – only cones, the greatest
sharpness of the vision
There are 3 kinds of cones with different photosensitive pigment (photopsin) responding for different light
yellowish-green
bluish-green
blue-violetish
–> The difference in signals received from 3 kinds allows the brain to perceive a wide range of different colors. Inability to perceive differences between some or all colors - color blindness.
- Bulbus oculi
Eyeball is approximately spherical
Weight 7,5gr.
2 poles
o anterior pole is the central point of the cornea
o posterior pole the central point of the sclera
Axis bulbi externus – line joining anterior and posterior poles externally – 24mm
Axis bulbi internus – line between internal surface of the cornea and the retina – 21.75mm
If internal axis is longer (~29 mm) - light produces image focus in front of retina = myopia (nearsightedness)
Distance vision is blurred, near vision clear
Correction with a minus lens
If internal axis Is less than normally (~ 20mm) - light is focused behind retina = hyperopia (farsightedness)
Problems with near vision
Correction with a plus lens
If front surface of the eye is not curved properly (or irregularly shaped lens) – light is focused in different focus = astigmatism
Eyeball consists of:
Tunica bulbi:
- tunica fibrosa – outer fibrous layer
- Tunica vasculosa – middle vascular layer
- Tunica interna s. retina – inner layer or retina
Nucleus bulbi
- lens
- Corpus vitreum
- Humor aqueous
Lens - made of transparent fibres
- covered by capsula lentis
- is connected with corpus ciliare (with m. ciliaris) by zonuta ciliaris (sunspensory ligaments)
- lens is flexible and its curvature is controlled by the ciliary muscle by changing the curvature of the
lens, we can focus the eye on objects at different distance from it – accommodation
- an opacity of the normally transparent lens leads to blurred vision - CATARACTA
Corpus viteum
- transparent jelly- like substance (99% water)
- occupies the posterior 4/5 of the eyeball
- is enclosed in the delicate vitreous membrane
- provides a cushioned support for the eye and clear path for light to travel to retina
Humor aqueous
- water-like fluid, fills the space between the posterior surface of cornea and anterior surface of vitreous body
- secreted by ciliary body processes
- flows into posterior chamber - camera bulbi posterior (between iris, zonula ciliaris)
–> then through narrow cleft between lens and iris - through pupilla - into anterior chamber - camera buibi anterior (between tenor surface of cornea and iris)
- humor aqueous is drained into sinus venosus sclerae (Schlemm’s canal)
- if normal humor production or absorption is disturbed, amount of fluid increases intraocular pressure rises, leads to compression of retina and damage of optic nerve — GLAUCOMA
- Organa oculi accessoria
Accessory visual structures are for protection and moving the eyeball:
Periorbita - lines the orbit like periostium
- Corpus adiposum orbitae - retrobulbar fat fills the orbit
» in it optic nerve and muscles are imbeded
- Vagina bulbi - connective tissue sheath
» surrounds eyeball from optic nerve to cornea
» separetes the eyeball from fat, provides free movements
- Palpebrae - eyelids
- tunica conjunctiva
- apparatus lacrimalis
- extrinsic muscles of the eyeball
Palpebrae - consist of the skeletal muscle – m. orbicularis oculi
- anterior surface of eyelid is covered by the skin
- posterior surface is covered by the conjunctiva there are two eyelids - palpebra superior et inferior
- rima palpebrarum - space between eyelids
- on free margin of eyelid are two parts:
» limbus anterior with eyelashes - cilia
» limbus posterior for openings of tarsal glands - gladulae tarsales (Meibomian glands)
* they secrete oily substance on the margin eyelid
Tunica conjunctiva - helps lubricate cornea; this membrane is divided into 2 parts:
1. palpebral conjunctiva
o covers posterior side of eyelid 2, bulbar conjunctiva
o covers sclera till cornea
+ conjunctival fornix (upper and lower) space between both parts of conjunctiva
+ conjuctival sac
+ plica semilunaris
+ caruncula lacrimalis - elevation in medial corner
Apparatus lacrimalis
- glandula lacrimalis secrets tears, tears flow through small excretory ducts to lacus lacrimalis
- lacus lacrimal, collects tears, is around caruncula lacrimalis
- punctum lacrimale - on small elevations papilla lacrimal placed on the medial pad eyelid’s free margin
- canaliculus lacrimalis — directs tears into lacrimal sac
- saccus lacrimalis — lies in the medial pat of optic cavity
- ductus nasolacrimalis - carrries into meatus nasi inferior
- Auris externa et interna
Auris externa consists of 2 parts: Auricula
meatus acusticus externus – terminates by membrana tympani
Functions:
- acoustic – sound transmission from the environment to tympanic membrane
- nonacoustic – protection of tympanic membrane and maintenance of a clear passage for sound
auricula – is formed by cartilage and covered by skin:
lobulus auriculae
helix
anthelix
tragus
antitragus
Meatus acusticus externus – 2,5 cm long; lined by skin with modified sweat glands, producing cerumen (earwax); could be divided into 2 parts:
1. external part – formed by cartilage
2. internal 2/3 – formed by temporal bone
Nonacoustic protective functions:
- to prevent objects from entering ear canal because of:
** tortuous course – it passes upward in anterior direction, then turns slightly posteriorly and slightly descends
** arrangement of hairs and production of wax in cartilaginous part
- to heat air – protect the middle ear from sudden temperature changes
membrana tympani – a thin membrane that separates the external ear from the middle ear
- formed by connective tissue, covered by skin from outside and mucous from inside
- oval in shape with diameter 9 x 11 mm; lies obliquely with its external surface downward
- external surface is concave; at its center a small depression – umbo – on its internal surface attachment
place of the handle of malleus (one of the ear ossicles)
Function
- to transmit sound from the air to the ossicles of the middle ear (malleus connects eardrum and other ossicles)
divided into 2 parts:
1. pars tensa – thicker lower part formed by fibrous tissue, fixed in osseous groove of temporal
bone
2. pars flaccida – thin small upper part 2 mm wide, formed by skin and mucous only
Tympanic membrane could be examined by otoscope:
- examiner first straightens ear canal by gentle pulling the auricle upward and backward to look through
instrument to see inside the ear
- normal eardrum appears pinkish-grey in colour
- there is a cone of light reflecting off the surface of the eardrum (at the 5 o’clock position in right ear or at the 7 o’clock position in left ear)
- Perforation (ruptura) of eardrum – a hole in eardrum:
o perforations occur from infections or injuries or barotrauma
o self-inflicted damage with a cotton swab or other device inserted into the ear
Auris interna consists of
Labyrinthus osseus – bony cavities
Labyrinthus membranaceus – membranous ducts and sacs – within bony cavities
–> Between the bony and membranous labyrinths is space lined by the periostium and contains a clear fluid perilymph
Functions:
enables hearing
maintains the balance in the human body
Labyrinthus osseus has 3 parts:
vestibulum
canales semicirculares (3)
cochlea
Vestibulum is 2mm wide; in lateral wall 2 openings:
fenestra vestibuli – oval window closed by stapes
fenestra cochleae – round window closed by membrana tympani secundaria
In vestibulum are 2 communications with the cranial cavity:
1. an internal opening of aquaeductus vestibule
2. an internal opening of canaliculus cochleae (near the round window)
–> it opens on posterior border of pars petrosa and communicates perilymphatic space of internal ear with subarachnoidal space (drainage)
Canales semicirculares (3):
1. canalis semicircularis anterior – in sagittal plane
2. canalis semicircularis posterior – in frontal plane
3. canalis semicircularis lateralis – in horizontal plane
Each canal has:
crus ampulare with ampulla
crus simplex
Crus commune – 2 simple limbs of anterior and posterior canals fuse
Cochlea contains:
- modiolus – in center
- canalis spiralis – twists 2,5 times around modiolus
- lamina spiralis winds around modiolus and divides canal into 2 parts, communication in helicotrema
o scala vestibule - above
o scala tympani - below
Labyrinthus membranaceus is lodged within labyrinthus osseus and filled by endolympha; it consists of several parts communicated with one another:
utriculus
sacculus
ductus semicirculares (3)
ductus cochlearis
Utriculus et sacculus:
both lodged within vestibulum and connected by ductus utriculosaccularis
both contain sensory areas of balance
from connection starts ductus endolymphaticus
o small duct that passes in aquaeductus vestibuli and terminates by saccus endolymphaticus
on posterior surface of pars petrosa (between two plates of dura mater encephali)
o by sac endolymph drains into (venous system) sinus petrosus inferior
Ductus semicirculares:
crus membranaceus simlex
crus membranaceus ampulare
crus membranaceus commune
each ampula contains sensory areas of balance
Sense of balance
Movements of the perilymph creates movements of the endolyph
→ they stimulate balance receptors
→ receptors in utriculus (lies horizontally) detect head movements in sagittal plane (up and down); receptors in sacculus (lies vertically) detect head movements in frontal plane (side to side); they are for static balance
→ in crus ampulare of semicircular ducts are receptors of kinetic balance; ducts are arranged at the right angle to each other (all planes represented); whenever the head begins or ceases to move, or whenever a movement of the head accelerates or decelerates, endolymph in semicircular ducts will change its speed → this change irritates receptors
→ receptor cells send impulses to the brain via vestibular nerve (part of n. vestibulocochlearis VIII), where they are interpreted as balance
Ductus cochlearis lies in canalis spiralis
triangular in cross section
connected to sacculus by ductus reuniens
contains hearing receptor – organ Corti
ductus cochlearis completely divides canalis spiralis into 2 scalas:
o scala vestibuli – upper, opens into vestibulum
o scala tympani – lower, terminates at fenestra cochleae
–> both spaces are communicated by helicotrema in upper part of cochlea
Sense of sound
Movements of the perilymph creates movements of the endolyph
→ they stimulate hearing receptors (organon Corti)
→ receptor cells send impulses to the brain via cochlear nerve (part of n. vestibulocochlearis VIII), where they are interpreted as sound
- Auris media
Auris media consists of 2 parts:
1. Cavitas tympani – contains a chain of 3 ossicles and 2 muscles
2. Tuba auditiva – connects tympanic cavity with nasopharynx (throat / pharynx)
Functions:
- helps transmit vibrations of eardrum to the internal ear (cochlea)
o vibrations have to be transferred from air outside to fluids inside
- uses hydraulic principles to minimize the loss of acoustic energy that would result from the transition
Thympanic cavity has 6 walls:
1. paries tegmentalis (superior wall)
2. paries jugularis (inferior wall)
3. paries caroticus (anterior wall)
a. with 2 openings (canalis musculotubarius)
4. paries mastoideus (posterior wall)
5. paries membranaceus (lateral wall)
6. paries labyrinthicus (medial wall) with 2 openings:
a. fenestra vestibuli – upper oval window
–> leads to the vestibular part of internal ear, closed by stapes
b. fenestra cochleae – lower round window
–> leads to scala tympani of internal ear, closed by membrana tympani secundariaSound transmission
ossicula auditus:
malleus – attached to internal surface of tympanic
membrane
incus
stapes – attached to oval window
- ossicles are joined by 2 synovial joints
- chain of ossicles is the sound–conducting apparatus
** transmits vibrations of tympanic membrane produced by sound waves to the fluid of internal ear
- small size of ossicles ensures that they easily vibrate to sound waves
- ossicles are shaped and aligned in such a way that they amplify the sound waves they transmit
Muscles of tympanic cavity are striated; they regulate the tension in the chain of ossicles:
m. tensor tympani
- pulls malleus, tenses tympanic membrane
- runs in semicanalis musculi tensoris tympani (canalis musculotubarius)
m. stapedius
keeps stapes in fenestra vestibuli
tuba auditiva – connects middle ear to the throat
Functions:
conducts air between tympanic cavity and the outside of body by throat and mouth
helps maintain equal air pressure on both sides of the eardrum (necessary for normal hearing)
Auditory tube has 2 parts:
cartilage part – 2/3, lies in pharyngeal wall
bony part – 1/3, lies in semicanalis tubae auditivae (canalis musculotubarius)
Auditory tube has 2 openings:
in the anterior wall of tympanic cavity
in the lateral wall of pharynx
The sound wave enters ear canal and moves tympanic membrane medially
→ malleus moves medially, causes movements of incus and stapes
→ base of stapes (attached to oval window) moves medially and generates a wave of perilymh in scala vestibule
→ wave from scala vestibuli moves via helicotrema to scala tympani and causes outward bulging of membrana tympani secundaria in round window (to stop waves of perilymph)
Intestinum Crassum et Peritoneum
Caecum
- Intraperitoneal organ – covered by
peritoneum
- No mesenterium
Appendix vermiformis
- Intraperitoneal organ
- Has mesenterium – mesoappendix
connecting ileum to appendix
Colon ascendens et descendens
o Mesoperitoneal organ – covered by peritoneum anteriorly, laterally and medially
o Posteriorly covered by tunica adventitia
Colon transversum
o Intraperitoneal organ
o Mesocolon transversum
Colon sigmoideum
o Intraperitoneal organ
o Mesocolon sigmoideum
Rectum
o Upper 1/3 intraperitoneal
o Middle 1/3 mesoperitoneal
–> anteriorly and laterally by peritoneum, posteriorly by tunica adventitia
o Lower 1/3 retroperitoneal
–> covered by tunica adventitia