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Byju's Answer
Standard VII
Biology
Circulation in Humans
Rhythmic cont...
Question

Rhythmic contraction and relaxation of heart muscles is known as:

A
Heart attack
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B
Heart disease
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C
Heart beat
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D
Heart defect
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Solution

The correct option is C Heart beat
To pump the blood into blood vessels, heart regularly contracts and relaxes in a rhythmic manner. It is known as ‘heart beat’.

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