Question

define heart beat?????????
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Answer 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.

Explanation:

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Answer 2

Answer:

1. the pulsation of the heart.

2. a single pulsation of the heart

❤ 3. an animating or vital unifying force

Explanation:

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