MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The Atrioventricular Valves are closed by pressure, the contraction of the ventricles causes the blood pressure to rise. This rise in pressure forces the blood out of the semilunar valves. What prevents eversion?
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Chordae tendineae
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Trabeculae carneae
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Pectinate muscles
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Crises terminalis
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Explanation:
Detailed explanation-1: -This pressure differential will force the AV valves closed, preventing blood from flowing back into the atria, and forcing blood into the next structure (either pulmonary trunk, or aorta depending on the ventricle in question).
Detailed explanation-2: -Valve Location and Function The pressure generated in the ventricles when the heart contracts during systole forces the atrioventricular valve leaflets back toward the atria, whereupon the leaflets meet – or coapt – to seal the annuli and prevent retrograde blood flow from the ventricles back into the atria.
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