The diagram given below represents a section of the human heart.
Which parts of heart are in the diastolic phase? Give a reason to support your answer.

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Solution

In the diagram, ventricles are in the diastolic phase. In the given diagram, arrow is shown from atria to the ventricles. It indicates that tricuspid and bicuspid valves are open and the blood is flowing from the atria to the ventricles. During this, the pressure in the ventricles falls and hence they are in the diastolic phase.

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