History, asked by gunjankarn071, 6 months ago

define the heart beat

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Answered by Anonymous

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.

Answered by golu9934

Answer:

the rythemic constraction and relaxion of heart causes heart beat

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define the heart beat​

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define the heart beat