Exercise 30 Anatomy of the Heart Flashcards
pericardial sac function
protects the heart, anchors it to surrounding structures, prevents overfilling of the heart with blood
parietal pericardium function
lines the internal surface of the fibrous pericardium
visceral pericardium (epicardium) function
visceral layer of the serous pericardium; often infiltrated with fat
myocardium function
composed mainly of cardiac muscle and forms the bulk of the heart; the layer that contracts
interventricular septum function
separates the ventricles
endocardium function
lines the heart chambers and covers the fibrous skeleton of the valves
right atrium function
receiving chamber for blood returning to the heart from circulation
pectinate muscle function
bundles of muscle tissue that forms ridges in the walls
fossa ovalis function
shallow depression that marks the spot where an opening existed in the fetal heart
superior vena cava function
returns blood from body regions superior to the diaphragm
inferior vena cava function
returns blood from body regions below the diaphragm
tricuspid valve function
prevents backflow into the atria when the ventricles contract
right ventricle function
short, low pressure circulation of deoxygenated blood
chordae tendineae function
tendinous cords that anchor the cusps to the papillary muscles protruding from the ventricular walls
papillary muscle function
anchors the valve flaps closed
trabeculae carneae function
irregular ridges of muscle that mark the internal walls of the ventricular chambers
pulmonary trunk function
routes the blood to the lungs where gas exchange occurs
pulmonary arteries function
circulates deoxygenated blood from the heart to the lungs
pulmonary veins function
transport blood from the lungs back to the heart
pulmonary semilunar valve function
guards the bases of the large arteries issuing from the ventricles and prevents backflow into the associated ventricles
left atrium function
receiving chamber for blood returning to the heart from circulation
mitral valve function
prevents backflow into the atria when the ventricles contract
bicuspid valve function
prevents backflow into the atria when the ventricles contract
left ventricle function
long, high pressure circulation of oxygenated blood
aortic semilunar valve function
guards the bases of the large arteries issuing from the ventricles and prevents backflow from associated ventricles
aorta function
largest artery in the body; circulates oxygenated blood throughout the body
ligamentum arteriosum function
in fetus, connects aortic arch and pulmonary trunk; helps support the aorta in times of trauma
aortic arch function
helps distribute blood to the head and upper extremities
left coronary artery function
provides arterial supply of the coronary circulation
anterior interventricular artery function
supplies blood to the interventricular septum and anterior walls of both ventricles
circumflex artery function
supplies the left atrium and the posterior walls of the left ventricle
right coronary artery function
provides arterial supply of the coronary circulation
great cardiac vein function
contributes to the venous drainage of the external layer of the myocardium
coronary sinus function
collects deoxygenated blood draining from the myocardium
1
brachiocephalic artery
2
superior vena cava
3
right pulmonary artery
4
ascending aorta
5
pulmonary trunk
6
right pulmonary veins
7
right atrium
8
right coronary artery
9
right ventricle
10
inferior vena cava
11
left common carotid
12
left subclavian artery
13
aortic arch
14
ligamentum arteriosum
15
left pulmonary artery
16
left pulmonary veins
17
circumflex artery
18
left coronary artery
19
left ventricle
20
great cardiac vein
21
anterior interventricular artery
1
superior vena cava
2
right pulmonary artery
3
pulmonary trunk
4
right atrium
5
right pulmonary veins
6
fossa ovalis
7
pectinate muscle
8
tricuspid valve
9
right ventricle
10
chordae tendinae
11
trabeculae carneae
12
inferior vena cava
13
aorta
14
left pulmonary artery
15
left atrium
16
left pulmonary veins
17
mitral/bicuspid valve
18
aortic semilunar valve
19
pulmonary semilunar valve
20
left ventricle
21
papillary muscle
22
interventricular septum
23
epicardium
24
myocardium
25
endocardium
