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ANT 3120: Chapter 20
Heart
42
Anatomy
Undergraduate 1
02/04/2013

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Term
function of cardiovascular system
Definition
transports nutrients, waste products, gases, and hormones around the body
Term
two circulations of the heart
Definition
1) pulmonary circulation
2) systemic circulation
Term
pulmonary circulation
Definition
blood that is sent to the lungs to get reoxygenated
Term
systemic circulation
Definition
all the blood carried to everywhere else in the body
Term
pericardium
Definition
double layered sac that surrounds the heart
Term
function of pericardium
Definition
anchors and protects the heart
Term
three layers of tissue of the wall of the heart
Definition
1) epicardium
2) myocardium
3) endocardium
Term
epicardium is also called
Definition
the visceral pericardium
Term
epicardium (description)
Definition
simple squamous epithelial tissue that lines the external surface of the heart
Term
myocardium
Definition
composed of cardiac muscle tissue
Term
endocardium is composed of
Definition
epithelial tissue and connective tissue
Term
endocardium (description)
Definition
lines the internal surface of the heart
Term
chambers
Definition
4 compartments that the heart is divided into
Term
atria
Definition
two superior chambers
Term
ventricles
Definition
two inferior chambers
Term
function of right atrium
Definition
receives deoxygenated blood from three blood vessels
Term
3 blood vessels that send blood to the right atrium
Definition
1) superior vena cava
2) inferior vena cava
3) coronary sinus
Term
superior vena cava sends ______ to the right atrium
Definition
deoxygenated blood from above diaphragm
Term
inferior vena cava sends ______ to the right atrium
Definition
deoxygenated blood from below diaphragm
Term
coronary sinus sends ______ to the right atrium
Definition
deoxygenated blood from the heart muscle (myocardium)
Term
the right atrium pumps
Definition
deoxygenated blood into the right ventricle
Term
function of left atrium
Definition
receives oxygenated blood from the lungs by way of the pulmonary veins (4)
Term
left atrium pumps
Definition
oxygenated blood into the left ventricle
Term
function of right ventricle
Definition
receives deoxygenated blood from the right atrium
Term
the right ventricle pumps
Definition
deoxygenated blood into the pulmonary trunk
Term
pulmonary trunk divides into
Definition
left and right pulmonary arteries
Term
function of left ventricle
Definition
receives oxygenated blood from the left atrium
Term
left ventricle pumps
Definition
oxygenated blood to the rest of the body by way of the aorta
Term
left ventricle (description)
Definition
left ventricle is much thicker than the right ventricle
Term
function of valves of the heart
Definition
prevents back flow of blood in the heart
Term
valves of the heart
Definition
1) atrioventricular valves
2) semilunar valves
Term
location of atrioventricular valves
Definition
between atria and ventricles
Term
location of the right AV valve
Definition
between the right atrium and the right ventricle (also called tricuspid valve)
Term
location of left AV valve
Definition
between the left atrium and the left ventricle (also called bicuspid or mitral valve)
Term
what are cordae tendineae attached to
Definition
papillary muscles located on the inner surface of the ventricles
Term
function of chordae tendineae
Definition
prevent the valves from swinging back into the atria
Term
function of semilunar valves
Definition
prevent back flow of blood into the heart
Term
location of pulmonary semilunar valve
Definition
between the pulmonary trunk and right ventricle
Term
location of aortic semilunar valve
Definition
between the aorta and the left ventricle
Term
branches of the left and right coronary arteries
Definition
1) marginal (right)
2) posterior interventricular (right)
3) circumflex (left)
4) anterior interventricular (left)
Term
myocardium of the heart receives
Definition
oxygenated blood by way of the branches of the right and left coronary arteries
Term
cardiac veins receive
Definition
deoxygenated blood from the myocardium of the heart and empty the blood into the right atrium by way of the coronary sinus
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