MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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prevent blood from leaking back into the ventricles
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prevent blood from leaking back into the atria
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allow blood to flow into the atria
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allow blood to leave the ventricles
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Detailed explanation-1: -The semilunar valves act to prevent backflow of blood from the arteries to the ventricles during ventricular diastole and help maintain pressure on the major arteries. The aortic semilunar valve separates the left ventricle from the opening of the aorta.
Detailed explanation-2: -The semilunar valves are located at the connection between the pulmonary artery and the right ventricle, and the aorta and the left ventricle. These valves allow blood to be pumped into the arteries, but prevent backflow of blood from the arteries into the ventricles.
Detailed explanation-3: -Since blood flows from the atria to the ventricles, mitral and tricuspid valves prevent backflow into the atria. Semilunar valves operate based on pressure differentials between chambers, which is what causes them to open and close. Their cusp shapes allow blood to pool, which keeps the valve closed.