GENERAL ANATOMY
CARDIOVASCULAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What prevents blood from flowing back into the atria when the ventricles contract?
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semilunar valves
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sinoatrial node
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atrioventricular node
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tricuspid and bicuspid valves
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Explanation:
Detailed explanation-1: -Mitral valve: This valve has two leaflets. They allow blood to flow from the lungs into the left atrium. And they prevent backward flow from the left ventricle to the left atrium.
Detailed explanation-2: -When the ventricles contract, atrioventricular valves close to prevent blood from flowing back into the atria. When the ventricles relax, semilunar valves close to prevent blood from flowing back into the ventricles.
Detailed explanation-3: -Final answer: Valves prevent the backflow of blood inside the heart during contraction.
There is 1 question to complete.