Heart #3
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| 4 valves regulate | 1 way flow of blood in heart
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| AV (atrioventricular) | loc bet atria and ventricles
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| right AV is | tricuspid
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| left AV is | bicuspid AKA mitral valve
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| chordae tendineae are CT words which | help anchor the cusps of valves to ventricular walls
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| semilunal (SL) valves: | loc at base of lg arteries that join H to ventricles
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| when ventricles contract: | pressure exceeds the BP in aorta and the SL valves are forced open
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| When ventricles relax the blood: | backwashes against these valves and cusps fill & close valves
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| septum is a | wall
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| sulcus is a | groove
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| all living cells require contact w: | blood supply
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| path of cardiac (cornorary) arteries: | to the capillary beds of myocardium and join the cardiac veins to form an enlarged vessel called the coronary sinus, which empties blood into the R artium
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| cardiac arteries: | vessels and their branches lie in epicardium and send branches into the myocardium. deliver blood when heart is relaxed
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| The L & R coronary arteries supply blood to the heart and arise from | base of aorta
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| L cornorary artery supplies mostly | left side and has 2 main arteries.
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| anterior interventricular artery and the circumflex artery come from the | left coronary artery
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| anterior interventricular artery | provides blood to the septum and both ventricles
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| circumflex artery | supplies the left atrium and left ventrical wall
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| R coronary artery | supplies R side of H and has 2 arteries.
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| Marginal artery and posterior interventricular artery are off the: | Right cornorary artery
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| Marginal artery supplies | myocardium of the lateral side of the right side of H
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| posterior interventricular artery runs to the: | heart apex,. supplies the posterior ventricular walls and merges (anastomoses) W/anter interventricular artery.
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| Cardiac veins | collect venous blood from capillary beds of myocardium
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| 3 veins that feed into the coronary sinus are: | great cardiac vein, middle cardiac vein & small cardiac vein
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| cardial veins return blood to the | R atrium
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| Cardiac muscle is | striated and uses sliding-filament mechanism
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| cardiac cells are | short, fat branched and interconnected
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Created by:
Jean and Study Pals