Lab Heart Flashcards
what is the function of the fluid that fills the pericardial sac
it allows the heart to beat with little friction
location of the heart in the thorax
mediastinum
superior heart chambers
atria
inferior heart chambers
ventricles
visceral pericardium
epicardium
receiving chambers of the heart
atria
equals cardiac muscle
myocardium
provide nutrient blood to the heart muscle
coronary arteries
lining of the heart chambers
endocardium
actual pumps of the heart
ventricles
drains the blood into the right atrium
coronary sinus
what is the function of the valves found in the heart
to enforce the blood flow in one direction by opening and closing in response to differences in blood pressure
what is the role of the chordae tendineae
to secure the cusps to the papillary muscles that protrude from the ventricular walls
what is the broad schematic of systemic circulation
systemic arteries-systemic capillaries-systemic veins-heart
what is the broad schematic of pulmonary circulation
pulmonary veins-lungs-pullmonary capillaries-pulmonary arteries-heart
what is the role of the pulmonary circulation
sends carbon dioxide rich blood to the lungs to deposit the carbon carbon dioxide and get oxygen to return to the heart
what is the role of the systemic circulation
takes oxygen rich blood from the heart to the body tissue then back to the heart
if the mitral valve does not close properly which circulation is affected
systemic
found between pulmonary trunk and the aorta; cordlike remnant of the fetal ductus arteriosus
Ligamentum arteriosum
oval depression in the interatrial septum; marks site of an opening in the fetal heart
fossa ovalis
translates to “beams of meat”; pitted, ridged appearance of inner ventricular muscle
Trabeculae carneae
small bundles of cardiac muscle where chordate tendinae originate
papillary muscles
heart strings”; tiny white cords that anchor cusps of AV valves to ventricular walls
Chordae tendinae
what are the three branches coming off the aorta in humans
a. Brachiocephalic artery
b. Lt. Common carotid artery
c. Lt. Subclavian artery
