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The diagram given below represents a sec...

The diagram given below represents a section of the human heart. Answer the questions that follow:

Which parts of heart are in the diastolic phase? Give a reason to support your answer.

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Ventricles are in the diastolic phase as semilunar valves at root of aorta and pulmonary artery are closed and bicuspid and tricuspid valves are open. Blood enters from atria to ventricles through atrio-ventricular valves
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