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Describe the action of the tricuspid valve when the ventricle is full

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Answer

It prevents backflow of the blood


Step-by-step explanation

Blood enters from the right atrium to the right ventricle through the tricuspid valve also called right atrioventricular valve. Ventricles are filled during diastole (relax) period and blood leaves the ventricle during systolic (when the ventricle contracts) period. During systole, this tricuspid valve closes and prevents the backward flow of blood into the right atrium. This causes all blood to move towards the pulmonary arteries.

User Vetrivel PS
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The tricuspid valve is the division separating the right ventricle and the right atrium. This allows the blood to flow into the ventricle but inhibits the backward motion. Thus, it closes when the ventricle is full. 
User Aorr
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