Question

The rhythmic expansion and contraction of the heart is called ________ ?​

Answer 1

Answer:

cardiac cycle is the right answer

Explanation:

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Answer 2

Answer:

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The contraction of heart is called cardiac systole,

Explanation:

The period of contraction is called systole. ... The cardiac cycle is defined as the time from the end of one heart contraction to the end of the subsequent contraction and consists of a period of relaxation called diastole followed by a period of contraction called systole.

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