Environmental Sciences, asked by rushikeshsadavarte13, 3 days ago

what is meaning of heartbeats

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Answered by MaiTaeKiQueenHu

1

Answer:

A heartbeat is a two-part pumping action that takes about a second. As blood collects in the upper chambers (the right and left atria), the heart's natural pacemaker (the SA node) sends out an electrical signal that causes the atria to contract.Heart beat is one complete contraction of the heart. It includes one systole and one diastole.

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