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प्रश्न
What is meant by ‘heart beat’?
अति संक्षिप्त उत्तर
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उत्तर
Heart beat is the rhythmic contraction and relaxation of the heart, which includes one systole (contraction phase) and one diastole (relaxation phase) of the heart.
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पाठ 1: Life Processes - Exercise 3 [पृष्ठ ८९]
