why does the ventricle relax as a closed chamber in the early phase of its diastole?

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Solution

The ventricles relax as closed chamber in the early phase of its diastole because the pressure in the ventricles drops from the peak that it reaches in systole. The pressure in the ventricles is below the pressure in the left atrium. So, the mitral valve opens, causing accumulated blood from the atrium to flow into the ventricle.

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The cardiac cycle is the sequence of events that occurs when the heart beats. In the __(i)_, the heart ventricles ___(ii)___ and helps fill the heart with blood. In the __(iii)_____ the ventricles ___ _(iv)____and pump the blood to the body through the arteries.

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(II) Tricuspid and bicuspid are open

(III) Semilunar valves are closed

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(c) As the tricuspid and bicuspid valves are open
(d)Joint diastole

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