Anatomy Flashcards
Brief anatomy review
Anatomical position?
Body facing forward, limbs extended, palms facing forward
Simple squamous epithelium line?
Lymphatic and blood vessels, pleura and peritoneum
Stratified squamous epithelium line?
Skin, esophagus, lower half of the anal canal
Cuboidal epithelia line?
Bowman’s capsule, convoluted tubules of the kidney, thyroid follicles.
Simple columnar epithelium line?
GI tract
Stratified columnar epithelium line?
Uterine tube
Pseudostratified columnar epithelia line?
Respiratory tract
Transitional epithelium line?
Ureter, urinary bladder, most of the urethra
How many embryo layers in the second week?
2 (bilaminar)
How many layers in the 3rd week of gestation?
3 (trilaminar)
Endoderm lies on the inside and gives rise to?
epithelium in the respiratory, GI and bladder (except trigone)
Ectoderm lies outside and gives rise to?
Epidermis (hair and melanocytes), retina, lens, CNS, PNS, pia and arachnoid mater, adrenal medulla
Mesoderm in the middle gives rise to?
Bones and muscles of trunk and extremities, cardiovascular system, spleen, kidney, ureter, and trigone of bladder, cartilage and muscle of respiratory system, adrenal cortex, thyroid glands, dermis of skin and dura mater of spinal cord
Suboccipital Triangle boundaries?
rectus capitis poster major, obliquus capitis superior, obliquus capitis inferior
Roof of suboccipital triangle?
deep fascia covered by semispinalis capitis
Floor of suboccipital triangle?
Posterior arch of C1 and posterior atlanto-occipital membrance
Contents of suboccipital triangle?
3rd part of vertebral artery, suboccipital N (dorsal ramus C1), suboccipital veins
What innervates all of the muscles forming the boundaries of the suboccipital triangle?
Dorsal Ramus of C1
Anterior cervical triangle boundaries?
anterior midline, inferior ramus of mandible and anterior border of SCM
Anterior cervical triangle roof?
skin, superficial fascia, investing layer of deep cervical fascia
Anterior cervical triangle contents?
carotid, submandibular, submental and muscular triangles
Carotid triangle boundaries?
SCM, posterior belly of digastric and superior belly of omohyoid
Roof of carotid triangle?
skin, subcutaneous fascia and investing layer of deep cervical fascia
Contents of the carotid triangle?
CN XI/XII, carotid sheath, containing common carotid artery, internal carotid artery, internal jugular V and CN X; lying anterior to the carotid sheath are lymph nodes and ansa cervicalis
Submandiblar (Digastric) triangle boundaries?
posterior and anterior bellies of digastric and inferior ramus of mandible
Roof of Submandiblar (Digastric) triangle
skin, superficial fascia
Floor of Submandiblar (Digastric) triangle
mylohyoid, hyoglossus and part of middle constrictor
Contents of Submandiblar (Digastric) triangle
submandibular gland, nodes, facial vein and artery, hypoglossal and mylohyoid N
Submental (Suprahyoid) triangle boundaries?
anterior bellies of both digastric and hyoid bone
Submental (Suprahyoid) triangle roof?
skin, subcutaneous fascia
Submental (Suprahyoid) triangle floor?
Mylohyoid muscles
Submental (Suprahyoid) triangle contents?
submental lymph nodes, submental veins
Muscular triangle boundaries?
SCM, superior belly omohyoid and anterior midline of neck
Muscular triangle roof?
Skin and superficial fascia
Muscular triangle contents?
sternohyoid, sternothyroid, thyrohyoid muscles, thyroid, trachea, larynx
Posterior cervical triangle boundaries?
SCM, trapezius, middle third of clavicle
Posterior cervical triangle roof?
skin superficial fascia, platysma, investing layer of deep cervical fascia
Posterior cervical triangle floor?
splenius capitis, levator scapulae, posterior scalene, middle and anterior scalene
Posterior cervical triangle contents?
subclavian artery, suprascapular, transverse cervical, occipital arteries, subclavian and external jugular veins (6 vessels), great auricular, lesser occipital, supraclavicular, transverse cervical nerves, trunks of the brachial plexus, CN XI (7 N)
Posterior cervical triangle subdivided by inferior belly of omohyoid into?
occipital and supraclavicular triangles
Triangle of Auscultation boundaries?
trapezius, latissimus dorsi, medial border of scapula
Triangle of Auscultation roof?
skin and superficial fascia
Triangle of Auscultation floor?
rhomboid major
Triangle of Auscultation contents
none
Lumbar triangle of petit boundaries?
latissimus dorsi, external oblique, and iliac crest
Lumbar triangle of petit roof?
skin and superficial fascia
Lumbar triangle of petit floor?
transversus abdominis
Lumbar triangle of petit contents?
none
Inguinal triangle of Hesselbach boundaries?
Rectus abdominis, inferior epigastric vessels and inguinal ligament
Inguinal ligament is the infolding of the lower end of the aponeurosis of external oblique and extends from the?
Anterior superior iliac spine to the pubic tubercle
Inguinal triangle of Hesselbach Roof?
skin and external oblique aponeurosis
Inguinal triangle of Hesselbach floor?
transversalis fascia
Direct hernias pass thorugh which anatomical triangle?
Inguinal triangle of Hesselbach
Femoral Triangle of Scarpa boundaries?
inguinal ligament, medial borders of sartorius and adductor longus
Femoral Triangle of Scarpa roof?
skin, superficial fascia and fascia lata
Femoral Triangle of Scarpa floor?
iliopsoas, pectineus, adductor longus
Femoral Triangle of Scarpa contents?
femoral N/A/V and femoral canal
What is in the femoral sheath?
femoral N/A/V
What forms the femoral sheath?
Fascia of trasversalis and iliacus
Femoral A/V/N lies outside of femoral sheath?
N
Boundaries of the Thoracic Outlet (Superior Thoracic aperture)?
T1 Vertebra (posterior), 1st rib (lateral), manubrium of sternum (anterior)
Thoracic Outlet (Superior Thoracic aperture) roof?
suprapleural membrane (Sibson’s fascia) - tip of TP C7 to inner aspect 1st rib
Thoracic Outlet (Superior Thoracic aperture) contents?
trachea, esophagus, thoracic duct, brachiocephalic trunk, L common carotid, L subclavian A, R/L brachiocephalic V, R/L CN X, phrenic N, R/L symp trunks, T1 of brachial plexus and sternohyoid, sternothyroid and longus coli
Axilla boundaries?
pec major and minor (anterior), subscap, teres major, lat dorsi (post), upper 4 ribs and serratus anterior (medial), bicipital groove of th humerus (lateral)
Axillary roof?
clavicle (anterior), 1st rib (medial), scapula (posterior)
Axillary floor?
skin, superficial fascia
Axillary contents?
axillary A and br, axillary V and tributaries, cords of brachial plexus and 6 groups of lymph nodes (anterior (pectoral), posterior (subscapular), infraclavicular, central, apical, lateral) aka APICAL
Quadrangular space boundaries?
teres minor (superior), teres major (inferior), long head triceps (medial), humerus (lateral)
Quadrangular space contents?
axillary N, posterior circumflex humeral A/V
Quadrangular space roof?
none
Quadrangular space floor?
none
Triangular Space boundaries?
teres minor (superior), teres major (inferior), long head of triceps (lateral)
Triangular Space contents ?
circumflex scapular branch of subscapular artery
Triangular Space roof?
none
Triangular Space floor?
none
Cubital Fossa boundaries?
pronator teres (medial), brachioradialis (lateral), btw humeral epicondyles (superior)
Cubital Fossa roof?
skin, superficial fascia w/median cubital V, deep fascia and bicipital aponeurosis
Cubital Fossa floor?
brachialis (medial), supinator (lateral)
Cubital Fossa contents lat to med?
radian N, biceps tendon, brachial A (radio-ulnar), median N
Anatomical Snuffbox boundaries?
abductor pollicis longus, extensor pollicis brevis (anterior) tendon of extensor pollicis longus (posterior)
Anatomical Snuffbox roof?
skin, superficial fascia w/cephalic V and superficial branch of radial N
Anatomical Snuffbox floor?
styloid process of radius, scaphoid, trapezium, base of 1st metacarpal
Anatomical Snuffbox content?
radial A and tendons of extensor carpi radialis longus and brevis
Carpal Tunnel roof?
flexor retinaculum 1” fibrous square attached to STOP bones (scaphoid, trapezium, os hamate, pisiform)
Carpal Tunnel floor?
trapezium, trapezoid, capitate, hamate
Carpal Tunnel contents?
median N, Tendons of flexor digitorum superficialis and profundus and flexor pollicis longus
What N passes over the carpal tunnel?
superficial palmar br of Median N
Guyon’s Canal/Ulnar Tunnel floor?
flexor retinaculum
Guyon’s Canal/Ulnar Tunnel roof?
pisohamate ligament
Guyon’s Canal/Ulnar Tunnel medial border?
pisiform
Guyon’s Canal/Ulnar Tunnel lateral border?
hamate
Guyon’s Canal/Ulnar Tunnel contents?
ulnar N/A
Inguinal Canal (of 2’s) boundaries?
ext ob aponeurosis and internal oblique (ant)
conjoint tendon and transversalis fascia (post)
Inguinal Canal (of 2’s) roof?
arching fibers of int ob and transversus abdominis
Inguinal Canal (of 2’s) floor?
inguinal ligament and lacunar ligament medially
Inguinal Canal (of 2’s) extent?
btw deep (btw ASIS and pubic tubercle) and superficial (med to pubic tubercle and above pubic crest) inguinal rings
Femoral Canal boundaries?
lacunar ligament (medial) inguinal ligament (ant) femoral vein (lateral) pectineus and pectineal ligament (post)
Femoral Canal roof?
CT
Femoral Canal contents?
lymph node (cloquet/rosenmuller), lymphatics, CT
Adductor/Subsartorial/Hunter’s canal boundaries?
Antlat: vastus medialis
Andmed: sartorius
Postlat: adductor longus/magnus
Adductor/Subsartorial/Hunter’s canal contents?
femoral A/V, saphenous N, N to vastus medialis
Popliteal Fossa boundaries?
Suplat: biceps femoris
Supmed: semitendinosis, semimembranosus
Inflat: lat head gastroc
Infmed: med head gastroc
Popliteal Fossa roof:
skin, superficial fascia w/short saphenous V and deep fascia
Popliteal Fossa floor?
lower end of femur, post knee jt, popliteus, fascia
Popliteal Fossa contents?
tibial N, popliteal V/A, common peroneal (fibular) N, nodes, fat, A deepest, tibial N most superficial and V btw N and A
Tarsal Tunnel location?
behind medial malleolus under the flexor retinaculum
Tarsal Tunnel contents:
Tom, Dick ANd Harry Tibialis Posterior tendon Flexor Digitorum Longus Tendon post tib A, V and N Flexor Hallucis longus tendon
The heart develops in which embryonic layer in which region at which week?
Mesoderm
Cephalic region
3rd week
What tissue forms the R/L endocardial tubes?
angioblastic tissue
The R + L endocardial tubes form the?
primitive heart tube
the primitive heart tube folds on itself and develops three dilations which are?
atrial
Ventricular
bulbus cordis
The proximal end of the heart tube is formed by?
Sinus venosus
The distal end of the heart tube is formed by?
Truncus Arteriosus
In the 5th week the atrial dilation is divided by?
Septum Primum
What is the hole in the upper part of the septum primum?
Ostium secundum
Another septum appears R of the septum primum and is called?
septum secundum
The septum secundum is incomplete inferiorly and remaining as the?
Limbus of the fossa ovalis
In the 7th-8th weeks the truncus arteriosus is divided into two separate tubes. What are they?
Aortic and pulmonic
The ductus arteriosus allows oxygenated blood to be shunted from ________ to _____
L pulm A
arch of the aorta
MC congenital heart disease?
Ventricular septal defect
Most common atrial septum defect?
Ostium secundum defect
MC congenital cyanotic heart disease?
Fallot’s tetralogy
What are fallot’s tetralogy?
pulmonary stenosis, ventricular septal defect, R ventricular hypertrophy, dextroposition of the aorta
Acyanotic congenital heart diesease are?
Atrial Septal defect, ventricular septal defect, persistent ductus arteriosus (all L-R shunts)
Surface markings of the heart?
3rd R costal cartilage 1 finger’s breadth from sternal edge
6th R costal cartilage 1 finger’s breadth from sternal edge
2nd L costal cartilage 1 finger’s breadth from sternal edge
5th L intercostal space 7-9cm from midsternal line
Cardiac chambers
R heart border = R atrium
Inf heart border = RV
L heart border made of LV and L auricle of L atrium
R atrium origins?
sinus venosus and true atrium
True atrium has the rough part which has ?
Pectinate muscles
Smooth and rough part of R atrium are separated by ?
Crista terminalis
The openings for the SVC and IVC are in which chamber of the heart?
R atrium
What is the depression on the interatrial septum called?
fossa ovale
Above the opening of the tricuspid valve lies the orifice of?
Coronary Sinus
How much venous blood drains into the heart via the coronary sinus?
60-70%
L atrium has how many pulmonary V carrying O2 blood from lungs?
4
T/F The L Atrium has both rough and smooth parts reflecting its dual embryological origins
True
R Ventricle has large fleshy structures known as?
trabeculae carnae and papillary muscles and septomarginal branch (moderator band)
The infundibulum is in which heart chamber?
R ventricle
The infundibulum in the right ventricle is the opening to the?
pulmonary valves
The LV and RV are spearated by the?
interventricular septum
What is the distinguishing feature of the LV?
thick muscular wall (3x that of RV) w/trabeculae carnae
Tricuspid with anterior, posterior, septal leaflets allows flow from?
RA to RV
Pulmonary with anterior, right, and left posterior semilunar valves allows flow from?
RV to pulmonary trunk
Mitral with anterior and posterior leaflets allows flow from?
LA to LV
Aortic with posterior, R/L anterior semilunar valves allow flow from?
LV to ascending aorta
The valve leaflets are attached to papillary muscles by fibrous chords called the?
Chorda tendinae
Coronary blood supply is from the?
R and L coronary arteries
The R coronary A originates from the?
R aortic coronary sinus
The R coronary A runs btw the right auricle and pulmonary trunk in the?
anterior atrioventricular sulcus
The R coronary A gives rise to?
sinu-atrial, R marginal, post interventricular, atrioventricular arteries
The R Coronary A supplies?
R atrium and ventricle, 30% L atrium, SA node (55%), AV node (85%), post 1/3 of interventricular septum
L coronary A originates from the?
L aortic coronary sinus
The L Coronary A runs between the?
left auricle and pulmonary trunk
The L Coronary A branches into?
Circumflex, anterior interventricular (L ant descending), L margina
The L Coronary A supplies?
LV, 70% LA, ant 2/3 interventricular septum
The coronary sinus drains how much of the venous blood of the heart?
60-70%
The coronary sinus drains the heart via which veins?
Great cardiac, small cardiac, middle cardiac, oblique cardiac
The great cardiac vein accompanies the?
L ant descending A
the small cardiac vein accompanies the?
R marginal A
the middle cardiac vein accompanies the?
Posterior interventricular A
The anterior cardiac V opens into the?
Right atrium
Where is the sino-atrial node located?
Upper R atrium near opening of SVC
The AV node is located in?
R atrium in posteriorinferior part (Triangle of Koch - septal leaflet of tricuspid valve, opening of coronary sinus, tendon of Todaro)
The Bundle of His is lacated in the?
membranous part of the interventricular septum
Right and L bundle branches are located in?
Muscular part of interventricular septum
Bundle branches of the heart end as the subendocardial _______ _____
Purkinje fibers
The SA node is innervated by?
Cardiac plexuses w/sympathetic fibers from T1-5 sympathetic ganglia and parasympathetic fibers from CN X
Superficial part of cardiac plexuses receive fibers from?
superior cervical sympathetic ganglion, inferior cardiac br of the Vagus
Deep cardiac plexuses receive fibers from the?
superior, middle, inferior cervical sympathetic ganglia, superior and inferior cardiac br of the Vagus and br from the recurrent laryngeal N from the vagus
Branches of the Thoracic aorta ascending aorta
R and L coronary A
Branches of the Thoracic aorta from the arch of aorta
brachiocephalic trunk, L common carotid, L subclavian
Branches of the Thoracic Aorta from the descending part
3-11th posterior intercostals, 3 bronchial branches, 4-5 esophageal br
The 4 paired visceral arteries of the abdominal aorta?
inferior phrenic, middle adrenal, renal, gonadal
4 paired parietal br off the abdominal aorta?
1st - 4th lumbar arteries