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Stack #33649
Heart #3
| Question | Answer |
|---|---|
| 4 valves regulate | 1 way flow of blood in heart |
| AV (atrioventricular) | loc bet atria and ventricles |
| right AV is | tricuspid |
| left AV is | bicuspid AKA mitral valve |
| chordae tendineae are CT words which | help anchor the cusps of valves to ventricular walls |
| semilunal (SL) valves: | loc at base of lg arteries that join H to ventricles |
| when ventricles contract: | pressure exceeds the BP in aorta and the SL valves are forced open |
| When ventricles relax the blood: | backwashes against these valves and cusps fill & close valves |
| septum is a | wall |
| sulcus is a | groove |
| all living cells require contact w: | blood supply |
| 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 |
| cardiac arteries: | vessels and their branches lie in epicardium and send branches into the myocardium. deliver blood when heart is relaxed |
| The L & R coronary arteries supply blood to the heart and arise from | base of aorta |
| L cornorary artery supplies mostly | left side and has 2 main arteries. |
| anterior interventricular artery and the circumflex artery come from the | left coronary artery |
| anterior interventricular artery | provides blood to the septum and both ventricles |
| circumflex artery | supplies the left atrium and left ventrical wall |
| R coronary artery | supplies R side of H and has 2 arteries. |
| Marginal artery and posterior interventricular artery are off the: | Right cornorary artery |
| Marginal artery supplies | myocardium of the lateral side of the right side of H |
| posterior interventricular artery runs to the: | heart apex,. supplies the posterior ventricular walls and merges (anastomoses) W/anter interventricular artery. |
| Cardiac veins | collect venous blood from capillary beds of myocardium |
| 3 veins that feed into the coronary sinus are: | great cardiac vein, middle cardiac vein & small cardiac vein |
| cardial veins return blood to the | R atrium |
| Cardiac muscle is | striated and uses sliding-filament mechanism |
| cardiac cells are | short, fat branched and interconnected |
Created by:
Jean and Study Pals