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Question

The contraction phase and relaxation phase of a human heart is called  ___ and ___ respectively. 


A
Diastole and Systole
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B
Systole and Diastole
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C
Lubb and Dubb
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D
Dubb and Lubb
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Solution

The correct option is A Systole and Diastole
The human heart works by contraction and relaxation of the cardiac muscles. The contraction phase is called systole and relaxation phase is called diastole.

Biology

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