Midterm Three Flashcards
Functions of the vertebral column
-support and upright body postition
-weight of the head
-houses/protects spinal cord and spinal nerves
Adult vertebral column contains __ vertebrae
26
How many cervical vertebrae
7
How many thoracic vertebrae
12
How many lumbar vertebrae
5
Function of curvatures
-inc strength
-shock absorber
Which vertebrae are immovable
Sacral and coggyeal
Cartilage of interverbreal discs
Fibrocartilege
Transverse process
Attachment site for ribs
Intervertebral foremen
Houses spinal nerves
Lamina
Superstates 3 processes
Pedicle
Gliding surface onto other spinal bones
-puzzle piece
Vertebral foremen
Opening
-where the spinal cord is
Body
Absorbs body weight
Difference between atlas and axis
Atlas- no body, contact with medulla, slightly larger, associated with head nod YES
Axis- smaller, has dens and spinous process, associate with head shake NO
Superior articular facets
Forms atlanto-occipital joint
_____ processes arise from the vertebral arch
Seven
Dens
2nd vertebra fits into first
Injury will affect medulla/physical trauma
Third to seventh vertebrae differences
-similar to thoracic
-most in common with each other
Thoracic vertebrae
-large and strong
-costal facets
-bodies articulate with the head of ribs
Which thoracic vertebrae do not articulate with the head of ribs
T11 and T12
Costal facets
Articulate the tubercles of ribs
Lumbar vertebrae
-largest and strongest (carry more body weight)
-no costal articular facets or transverse foramen
-intervertebral disc massive
Sternocleidomastoid O and I
O: manubrium of sternum and clavicle
I: mastoid process of temporal bone and nuchal line of occipital bone
Sternocleidomastoid function
Flexes cervical portion and head at Atlanta-axial joint
scalene muscles O and I
O: transverse process of ribs 2-7
I: first and second ribs
Scalene muscles function
Elevate the ribs
Anterior group of muscles (of neck, that move the head)
-sternocleidomastoid
-scalene muscles
Direction of blood flow to circle of willis
- Arch of aorta
- Subclavian
- Vertebral
- Basilar
- Cerebral arteries (posterior, anterior and middle)
- Circle of willis
Circle of Willis supplies blood to
The pituitary gland
Function of the thorax (rib cage)
-Protects: heart, lungs, trachea
-supports for upper limb
-breathing
Xiphoid process
Attachment for abdominal muscles
Body of ribs
Attachment for 12 ribs
Manubrium
Clavicle and rib attachment
-as well as some muscles
How many bones in the thoracic cage
25
Floating ribs
11-12
Which of the three articulate with the costal cartilages of ribs
-manubrium
-body
-xiphoid process
Manubrium and body
True ribs
1-7
-direct attachment to the sternum
False ribs
8-10
Indirect attachment to the sternum
How many false ribs are there
5 ribs
-ten altogether (two slides)
Where do the false ribs attach
Attach to rib 7
Floating ribs
11-12
No attachment to sternum at all
How many true ribs
There are seven
How many false ribs
5
How many false ribs that are not floating ribs
3
How many Floating ribs
2
Muscles of inspiration
-diaphragm
-external intercostal
Muscles of expiration
-diaphragm
-internal intercostal muscle
Accessory muscles of breathing
Forced exhalation:
-internal intercostals
-abdominal muscles
-transversus thoracic
-serratus posterior inferior
Accessory muscles of breathing
Forced inhalation:
-sternocleidomastoid
-scalenes
-pectoralis minor
-serratus posterior superior
-erector spinae
Where are the cervical plexus located
C1-c4
-Anterior rami
Phrenic nerve
Travels through thoracic cavity to innervate the diaphragm
Segmental branch
Deep muscles of neck
-levator scapulae
-scalene muscles
Cervical plexus superior roots
-infrahyoid
-geniohyoid
Cervical plexus inferior roots
Infrahyoid muscle
Receptor for olfaction
Olfactory
Receptor for gustation
Gustatory
Receptor for vision
Photoreceptor
Receptor for hearing
Inner hair cell
Stimuli’s is the
Activation of receptors
General senses
Temperature, pain, touch, stretch and pressure
Special senses
Gustation, olfaction, vision, equilibrium and hearing
Olfactory receptor cells
Detect odour
Supporting cells
-SUSTAIN RECEPTOR CELLS
Support
-nourishment
-insulation to receptor cells
-odour binding proteins
Basal cells
Replace worn out olfactory receptor cells
Bowman’s glands
Mucous producing glands that moisten the epithelial surface
-dissolve the odorant molecules
Olfactory gland
Contains immune mucus
What lobe does olfaction stimuli’s go to
Temporal lobe
Sweet taste
Sugars
Salty taste
Na+ and Cl-
Sour taste
Acids (H+)
Bitter taste
Alkaloids
Umami taste
Amino acids
Taste buds are found in
Papillae
Papillae
Elevations on the tongue
Filiform papillae
-tatctile receptors
-no taste buds
Not involved in food taste
Fungiform papillae
5 taste buds
-over entire surface of tongue
Vallate papillae
100-300 taste buds
-V shape row at back of tongue
Foliate papillae
Lateral margins of tongue
-degenerate in early childhood
Most involved taste buds
Vallate papilla
Where does taste stimuli get sent
Insula
Gustatory pathway cranial nerves
CN VII facial n
CN IX glossopharyngeal
CN x vagus
Olfactory pathway cranial nerves
CN I olfactory nerve
Palpebrae
Eyelids
Levator palpebrae
Muscle - provides a weak twitch
Palpebral fissure
Space between eyelids
Lacrimal caruncle
Contains sebaceous and sudoriferous glands
Tarsal plate
Support the eyelids
Tarsal glands
Located in the tarsal plate
Chalazion
Tumour or cyst in tarsal glands
Conjunctiva
Lining over the anterior surface of the eye
Palpebral conjunctiva
Thin protective mucous membrane
Tarsal glands
Sebaceous glands within eyelids
-prevents overflow of tears and sticking together of eyelids
Palpebral commissaries
Corners of the eyes
Lacrimal caruncle
Pink bump containing ciliary glands that produce gritty secretion
The superior eyelid is ….
More mobile
-protivetive
Choroid
Vascular, contains melanocytes
Sclera
Support, protection, maintains shape of the eye, and site of muscle attachment
Cornea
Avascular collagenous tissue
Retina
Inner most
-only structure responsible for converting light into rods and cones
Ciliary body/process
Melanocytes, aqueous humor
Iris
Coloured portion of the eyebal
-two smooth muscles
Pupil
Opening in the iris
-regulates light entrance
Fibrous tunic
Outer layer
Macula lutea
Contains the fovea centralis
Fovea centralis
Highly concentrated site of cones
-very sharp image
Optic disc
-blood vessels and nerves
Blind spot due to no rods or cones
Order of the three layers of inner layer (out to in)
-sclera
-choroid
-retina
Vascular tunic
Middle layer
Anterior chamber
Between iris and cornea
-filled with aqueous humor
Posterior chamber
Found between lens and iris
-vitreous humor
Pigmented layer of the retina
Melanin in the pigmented layer helps to absorb stray light rays
Neural/sensory layer in the retina
Photoreceptor, bipolar, ganglion cell layer
Cells present in bipolar cell layer
-horizontal cells
-amacrine cells
Photoreceptors
Rods, cones
Photoreceptor cells
Outermost layer, composed of rods and cones
Bipolar cells
Synapse with photoreceptors and ganglion cells
Ganglion cells
Innermost layer of retina
-these cells leave retina and form optic nerve
Rod
Black/night vision
-fine vision
100m
Cones
Colour vision
10m
Pigmented layer
Light rays and photoreceptors
Optic disc
Blind spot
-lacking photoreceptors
Fovea central is
Depression in the retina containing the highest proportion of cones and almost no rods
-sharpest vision
Fovea central is is located
Within macula lutea
Visual pathway leads to
Occipital lobe
-primary visual cortex
External ear
Collects sound waves
Middle ear
Transmit sound waves to oval window
Internal ear
Receptors for hearing and equilibrium
Auricle/pinna
Protects the entry into the ear and directs sound waves
Ceruminous glands
Produce wavelike secretion of cerulean
-reduces infection
Tympanic membrane
Vibrates when sound waves hit it
-vibrations provide means for transmission of sounds wave energy
Auditory ossicles
Malleus, incus and stapes
Transmitting sound enters into the inner ear via
Oval window
Round window
Separates the middle ear from inner ear
Auditory tube
Open connection with the atmosphere
Tympanic cavity of the middle ear housing
the three smallest bones of the body
Membranous labyrinth
Within the body labyrinth
-consists of fluid filled tubes and spaces
Perilymph
Fluid within osseous labyrinth, surrounding and protecting membranous labyrinth
-extracellular fluid
Endolymph
Fluid within membranous labyrinth of the inner ear
-intracellular fluid
Semicircular canals
Each contain a membranous labyrinth structure called semicircular duct
Vestibule
Contains two saclike membranous labyrinth structures
-utricle
-saccule
Cochlea
Houses membranous labyrinth structure called choclear duct
Bony labyrinth is
Temporal bone
Utricle and saccule
Detect head position during static equilibrium
Cochlear duct
Housed within cochlear
Organ of corti
Sensory structure for hearing
-sensory epithelium with hair cells and supporting cells
Inner hair cells
Sensory receptors
Turning sound into Action Potential
Basilar membrane
Floor of the cochlear duct
Auditory pathway
Vestibulochoclear nerve to temporal lobe
Static/linear equilibrium
-utricle and saccule
Maintain position of the body relative to the force of gravity
-maculae
Maculae
Detects both orientation of head when body is stationary and linear acceleration
Dynamic/rotational equilibrium
-semicircular canal
Maintains the body position in relation to sudden movements
-crista
crista ampullaris
Rotation of head causes endolymph to push against the hair cells
-bending of stereocilia initates a nerve impulse
Vestibular apparatus includes
-saccule
-utricle
-semicricular ducts
Macula
Sense organs of utricle and saccule
Hair cells
Sensory receptors that detect static or linear equilibrium
-surface of macula
-sensory receptor
Otoliths
Small calcium carbonate crystals within the macula structure
Kinocilium
If bent of displaced, changes the amount and rate of neurotransmitter release form the hair cell
-larger stereocillia
Stereocilia
Found on apical surface, part of hair cells, numerous micro ville
Hair cells bending
Produces AP
Crista
-detects equilibrium
Semicircular ducts
Detect dynamic/rotational equilibrium
Equilibrium pathways
Vesicular area in cerebral cortex
Principal functions of the respirator system
-gas transport and exchange
-protection (gas conditioning, filtering)
-produces sounds
-olfaction
-defense
-elimates small amount of water and heat
Otorhinolaryngology
Ear, nose and throat
Pulmonologist
Diagnosis and treatment of lung disease
Paranasal sinuses
-frontal
-ethmoidal
-sphenoidal
-maxillary
Frontal sinus
nasal cavity
Pharynx
The throat, common pathway for inhaled and exhaled air, ingested food
Larynx
Voice box
-prevents ingested materials entering the trachea and bronchi
-sound for speech
-pressure in abdominal cavity
-sneeze and couch reflex
Trachea
Connnects larynx to main bronchi
-conducts air, participates in couch reflex
-hyaline cartilage
-found after larynx to T5
Bronchi
Largest airway
-conducts air
Bronchioles
Smaller conducting airway
-smooth muscle
-conducts air
Pleura
Serous membranes enveloping the lungs and lining the walls of the pleural cavity
Diaphragm
Conducting zone consists of
-trachea
-main bronchi
-lobar and segmental bronchi
-bronchioles
-terminal bronchioles
Purpose of conducting zone
Filter, warm, moisten and conduct air
Respiratory zone
-respiratory bronchioles
-alveolar ducts
-alveolar sacs
-alveoli
Purpose of respiratory zone
Gas exchange between air and blood
External nose
Skin and muscle- covered portion of nose
7 cartilages of the nose
-septal (unpaired)
-lateral (paired)
-alar (paired) (minor)
Nasal cavity
-Filters air
-protective immune system
Two regions of nasal cavity
Respiratory (cleaning and filtering)
Olfactory (sensing smell)
Dehydration in the nasal cavity
Mucous membrane breaks, nose bleeding
Concha
Increase surface area
Nostril
Passage of air
Olfactory epithelium
Olfactory receptors
Meatus
Air conditioning
-increased surface area
Chonanae
Separates nasal cavity and throat
Conchae
Bonds projections from lateral wall of nasal cavity
Meatuses
-Air passages between conchae
-lined by mucous membrane
Swirl and moisten inhaled air
Goblet cells
Produce mucous that moistens the air and traps dust particles
Cilia
Move the mucus and trapped dust particles toward the pharynx
Paranasal sinuses and nasolacrimal duct
Secretions help moisten the air
Three functions of the internal structures of the nose
-warming, moistening and filtering inhaled air
-detecting olfactory stimuli
-modifying speech as air passes through
Pharynx
Passageway for air, liquid and food
-resonating chamber for speech
-houses tonsils
Three regions of pharynx
-nasopharynx
-oropharynx
-laryngopharynx
Nasopharynx
During swallowing, self palate and uvula elevates to block the nasal cavity to prevent air entry into food
Five openings of nasopharynx
-two internal nares
-two openings leading to Eustachian tubes
-single opening into oropharynx
Uvula
Elevates-block nasal during digestion
Paired auditory tubes
Connect the nasopharynx to tympanic cavity
Pharyngeal tonsil
Houses a lot of immune cells
Oropharynx
Digestive and respiratory functions
-allow the passage of food,, fluid and air
Palatine tonsil, lingual tonsil
Like a second chance to destroy pathogens
Epiglottis
Eating and breathing
-stops choking
Laryngopahrynx
Both digestive and respiratory functions
-glossopahryngeal, vague nerves
Larynx
-air passageway
-produces sound for speech
-increases pressure in abdominal cavity
-sneeze and cough reflex
How many pieces of cartilage in the larynx
Nine in total
-three single
-three paired (six)
Three single cartilages
-thyroid, epiglottis, cricoid
Function: support and protect larynx
Three paired cartilages in larynx
-arytenoid, cuneiform, corniculate
Functions: involved in sound production
Vocal folds
True vocal cords
-opening, closing
Vestibular folds
False vocal cords
-doesn’t directly involve
Location of trachea
Larynx to T5
Tracheal cartilage is
Hyaline
Angular ligament of the trachea
Muscles to contract (night) and expand (day)
Conducting zone of bronchial tree (top to bottom)
-trachea
-main bronchi
-lobar and segmental bronchi
-bronchioles and terminal bronchioles
Respiratory zone of the bronchial tree
-respiratory bronchioles
-alveolar ducts
-alveolar sacs
Right lung lobes
-superior lobe
-middle
-inferior
Left lung lobe
-superior lobe
-inferior lobe
What fissure separates the superior lobe from middle lobe (right lung)
Horizontal fissure
What fissure separates the middle lobe from the inferior lobe (right lung)
Oblique fissure
What separates the inferior from the superior lobe in the left lung
Oblique fissure
Apex of the lung vs base of lung
Apex- top
Base- bottom
Left lung function
Smaller due to heart
Hilum
Right lung
-blood vessels enter and leave
Cardiac notch
Left lung
-left ventricle pushes lung
Type I alveolar cell
Permits gas exchange
-squamous epithelium
Type II alveolar cell
Reduces surface tension/ stop from collapsing
-secrete surfactant
Alveolar macrophages
Engulf particles
-phagocytic cells
Type of epithelium in alveolar cells
Simple squamous
Pulmonary circulation
-right side heart Pumps deoxygenated blood thru pulmonary arteries to the lungs
-picks up oxygenated blood by pulmonary veins to bring back to left heart
Systemic circulation
-left side of heart pumps oxygenated blood thru systemic arteries to body cells
-systemic veins carry deoxygenated blood to right side
Where is the heart located
In the mediastinum
Heart is enclosed within tough sac called
Pericardium
Pericardium
-double serous membrane
-encloses the heart
Parietal and visceral
Fibrous pericardium
Prevents over stretching of the heart
-anchors to the mediastinum
Myocardium
Middle and thickest layer
-full of cardiac muscles for contraction
Endocardium
Lines the internal surface of heart chambers
-simple squamous epithelium and areolar
Parietal vs visceral
Parietal - outer
Visceral - inner
Serous pericardium
Made of parietal and visceral
Epicardium
Visceral layer of the serous pericardium
-areolar connective tissue
Three layers of heart wall structure (superficial to deep)
-epicardium
-myocardium
-endocardium
Cardiac muscle characteristics
-intercalated discs
-desmosomes (for flexibility)
-gap junctions (action potential to spread)
Sulci
Surface markings/grooves
-mark boundary between two chambers
Three sulci
-coronary
-anterior interventricular
-posterior interventricular
Coronary sulcus
Marks boundary between superior atria and inferior ventricles a
Anterior interventricular sulcus
Right and left ventricles
Posterior interventricular sulcus
Between the ventricles on posterior side of heart
Artery and vein within posterior interventricular sulcus
-posterior interventricular artery
-middle cardiac vein
Anterior interventricular sulcus artery
Anterior ventricular artery
Artery in coronary sulcus
Right coronary artery
Features of Right atrium
-receives deoxygenated blood from three veins
-contains pectinate muscles
-tricuspid valve
-fossa ovalis
Three veins of the right atrium
-superior/inferior vena cava
-coronary sinus
Coronary sinus
Deoxygenated blood from heart surface
Pectinate muscles
Expand size of atrium to hold blood
-internal smooth muscles
Fossa ovalis
Oval shaped depression
Foramon oval
Direct transport across lung as fetus’ lungs do not function
Features of right ventricle
Deoxygenated blood to pulmonary arteries
-trabeculae carneae
-chordae tendineae
-pulmonary valve
Trabeculae carneae
Raised bundles of cardiac muscle fibres
Chordae tendineae
Secures atrial ventricle walls and papillary muscles
-controls opening and closing
-tendon sheet
Pulmonary valve
Opens on contraction
Papillary muscles
Regulate opening and closing veins
Left atrium features
-pulmonary veins
-bicuspid
Bicuspid valve
Separates left atrium from left ventricle
Left ventricle
Thickest- transports blood through body
-trabeculae carneae
-chordae tendineae
Atria chambers vs ventricle
Atria - thinner (less pressure and distance)
Ventricle - thicker (more pressure and distance)
Four valves
-pulmonary valve
-aortic valve
-bicuspid valve
-tricuspid valve
aortic valve
End of the left ventricle and entrance into the aorta
Pulmonary valve
Between right ventricle and pulmonary trunk
Tricuspid valve
Between right atrium and right ventricle
Arterioles and capillaries are a part of which circulation
Systemic
Pulmonary capillaries and veins are a part of which cirulation
Pulmonary circulation
Left coronary arteries
Anterior interventricular artery and circumflex artery
Anterior interventricular artery
Wall of both ventricles and interventricular septum
Circumflex artery
Wall of left atrium and ventricle
right coronary arteries
Maringal artery and post artery
Marginal artery
Wall of right margin of the heart
Post artery
Left and right posterior ventricles
Coronary circulation function
Supplies blood to heart wall
Conductive system function
Propagate electrical impulses to contractile cells
Order of conductive system
- sinoatrial node
- Atrioventricular node
- Atrioventricular bundle (bundle of his)
- Right and left bundle branches
- Purkinje fibers
Endothelium in a vein versus an artery
Artery- narrow
Vein- wide
Internal elastic lamina in a vein versus an artery
Vein- contains none
Artery - contains
Tunica media in a vein versus an artery
Vein - thinner/ artery - thicker
External elastic lamina in a vein versus an artery
Vein - contains none/ artery- contains
Tunica external in a vein versus an artery
Vein - thicker/ artery - thinner
Vasa vasorum in a vein versus an artery
Vein - more/ artery -less
Capillary differences
One layer of epithelium /no tunica external or tunica media
Veins vs arteries
Veins - contain valves, thinner tunica media, but thicker tunica external, diameter of tunica intima is larger
Arteries - thicker tunica media, thinner tunica external, diameter of tunica intima is smaller
Three types of arteries
-elastic
-muscular
-arterioles
Elastic arteries
-recoiling capacity due to elastic fibers (tunica media)
Elastic arteries examples
-arteries in the heart : aorta/pulmonary, brachiocephalic, subclavian
Muscular arteries
More smooth muscle, greater vascoconstriction and vasodilation, vascular tone, large internal elastic lamina
Vascular tone
Partial contraction of smooth muscles (muscular arteries)
Examples of muscular arteries
Brachial, anterior tibial, coronary and inferior mesenteric (around stomach)
Arterioles
Smallest, sympathetic innervation, less than six cell layers of smooth muscle in tunica media
Function: supply to tissue layer
Capillaries
Smallest blood vessels, solely of tunica intima, exchange vessel of the body
Continuous capillaries
Membranes of endothelial cells form a continous tube
Location of continous capillaries
Muscles and the brain
Fenestrated capillaries
Many fenestrations (hole in endothelium layer)
Location of fenestration
Small intestine, kidney
Sinusoids capillaries
Wider, large fenestrations, incomplete or absent basement membrane, large intercellular clefts
Location of sinusoids capillaries
Bone marrow and liver
ductus Arteriosus becomes
Ligamentrium arteriosum
Foremen ovale becomes
Fossa ovalis
Ductus venosus becomes
Ligamentum venosum
Umbilical vein becomes
Ligamentum teres
Umbilical arteries become
Medial umbilical ligaments
Function of the lymphatic system
Transports fluids and helps fight infections
-stores excess interstitial fluid (lymph)
Lymph vessels transport
Dietary lipids
Lacteals
Absorb lipids in the intestine
Principle lymphatic trunks
-jugular trunks
-subclavian trunks
-bronchomediastinal trunks
-intestinal trunk
-lumbar trunk
Lymph passes from lymphatic capillaries into
Lymphatic vessels
From lymphatic vessels they travel then through
Lymph nodes
Lymph nodes/lymphatic vessels unite to form
Lymph trunks
Jugular trunks
The head and neck
Subclavian trunks
Upper limbs, breasts and superficial thoracic wall
Bronchomediastinal trunks
Deep thoracic structures
Intestinal trunk
Most abdominal structures
Lumbar trunks
Lower limbs,abdominopelvic wall and pelvic organs
Lymphatic ducts form from the fusion of
Lymphatic trunks
Right lymphatic duct is deep to the _____ and returns lymph at the junction of the _____
- Clavicle
- Right subclavian and internal jugular veins
Right lymphatic duct
Returns lymph from the right side of the head and neck, right upper limb and right side of thorax
Thoracic duct
Largest lymphatic vessel
-collects from most of body except right lymphatic duct drainage
Macrophages
Engulf foreign substances, present antigens to other lymphoid cells
-phagocytosis
Nurse cells (special epithelial cells)
Secretory cells in the thymus
Dendritic cells
Internalize antigens and present them to lymphocytes
Lymphocytes
Most abundant lymphoid cells
Three types of lymphocytes
T-lymphocytes
B-lymphocytes
Natural killer
T-cells
Destroy virally infected cells and cancer cells
B-cells
Produce antibodies against bacteria
NK cells
Destroy cancer cells
Thymus
-site of T-lymphocyte maturation and differentiation
-stores maturing lymphocytes
Where is the thymus located in adults
Superior mediastinum
Where is the thymus located in children
Anterior and superior mediastinum
Lymph nodes
Filter lymph, mount immune responses
Located: throughout body
Spleen
-filters blood and recycles RBC and platelets
-blood reservoir
-houses lymphocytes
-immune responses
Spleen location
Left upper quadrant of abdomen
-9th to 11th ribs
Cortex of thymus
Immature T cells migrate from red bone marrow
-where T cells proliferate and mature
What cells does the cortex contain
Immature T-lymphocytes, nurse cells and macrophages
Nurse cells secrete
Thymus hormones
The medulla (thymus) contains
Mature T-lymphocytes and epithelial cells
Trabeculae
Divide a lymph node into compartments
Stroma of lymph node
Red pulp surrounds each cluster of
White pulp
Parenchyma is made up of
White pulp and red pulp
White pulp
T and B lymphocytes, and macrophages
-immune responses
Red pulp
Blood filled venous sinuses
-removes defective blood cells and platelets
-stores platelets
-produces RBC during fetal life
Aqueous humor
Removes waste products and helps maintain chemical enviroment
-secretes into posterior chamber
Scleral venous sinus
Found between cornea and sclera
-resorted aqueous humor to the veins that drain the eye
Vitreous humor
Fills space between the lens and retina
-maintains eye shape, support retina and transmits light from lens onto the retina
Hyaloid canal
Found within vitreous humor, remnant of embryonic blood vessels
Amacrine cells
Process and integrate visual information
Ganglion cells
Innermost layer in neural layer
-neuronal convergence between bipolar cells