lab four: heart
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20 Terms
What does the cardiovascular system do
carries oxygen and nutrients to cells and removes carbon dioxide and wastes
What is the pulmonary circuit
pumps blood to the lungs
What is the systemic circuit
pumps blood to the body
What is the coronary circuit
supplies blood to the myocardium
What does the visceral pericardium do
covers the surface of the heart
What does the parietal pericardium do
lines the pericardial sac
What is found in the pericardial cavity
pericardial fluid
What is the myocardium
cardiac muscle layer of the heart wall
What are cardiac muscle cells like
small, branched, striated, one nucleus, connected by intercalated discs
What does the right atrium receive
deoxygenated blood
What does the left atrium receive
oxygenated blood
What does the right ventricle do
pumps deoxygenated blood to the lungs
What does the left ventricle do
pumps oxygenated blood to the body
What do atrioventricular valves do
prevent backflow into the atria
What do semilunar valves do
prevent backflow into the ventricles
What are chordae tendineae
fibrous cords attached to papillary muscles
What are trabeculae carneae
irregular muscle ridges in ventricles
What are pectinate muscles
muscle ridges in the atria
What is the interventricular septum
wall separating the ventricles
What is the coronary sinus
large vein that collects cardiac venous blood
