Summary Anatomy of the heart high yield notes with illustrations and labels.

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pericardium
movement of the heart
-
Fibrous .

tough limits , unnecessary

•

fuses above with walls of great blood vessels ( DA , PT , )
SVC , IVC , PV

-
attached to central tendon of diaphragm
-
attached to sternum by : sterno pericardial ligaments


-

serous -


parietal layer
-
lines fibrous pericardium
-

visceral layer
-

closely covers the heart

-


pericardial fluid

-
~ 50mL lubricant to facilitate cardiac movements



•

pericardial .
transverse sinus

sinuses -
at posterior surface of heart
-
between serous pericardium around aorta and pulmonary trunk
and reflection around great veins

sinus
oblique
-




recess formed by reflection of serous pericardium
-




around vena cava e and 4 pulmonary veins




Nerve supply phrenic nerves
•
.




?⃝

, Thoracic cavity




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Heart
.
Structure .


epicardium : visceral layer of serous pericardium
myocardium : middle , thick layer of cardiac muscle
-




-


endocardium : inner , thin layer



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Chambers .


Right Atrium

auricle + main cavity
I(external)
•




-

sulcus terminalis : junction bet .




.
crista terminalis : junction bet . sinus venous

and atrium proper


mvsculipectinati rough interior of
'
:


auricle


..in.
.

:


-
Svc : at upper RA ; no valve
at lower RA ; has rudimentary valve
Ivc :
-




-

coronary sinus : bet . NC and AV orifice ; has rudimentary valve
-
R atrioventricular orifice : anterior to NC
opening ; tricuspid valve

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Fetal Remnants
-

fossa ovalis : foramen ovale

-

annulus ovalis :
upper margin of fossa