Biology, asked by Sujan5336, 9 months ago

when does human heart starts beating

Answers

Answered by MortalXAyush

Answer:

when it contracts or relaxes

Answered by chandusmile20039

Answer:

Sorry but you're question is incomplete.

If you're asking it when the embryo develops inside the womb, then the answer is that it normally starts beating after 21 days from the fertilization.

Explanation:

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