ICSE Class X Biology 2017 Solved Papers

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The diagram given below represents a section of the human heart. Answer the questions that follow:
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Question : 77
Total: 101
Which part of heart are in the diastolic phase? Give a reason to support your answer.
Solution:  
Ventricles are in diastolic phase. Because the Auriculo ventricular values are open and blood is pumped from the auricles to the ventricles.
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