Biology, asked by Anonymous, 4 months ago

What is SA Node ? Give 3 uses​

Answers

Answered by portugalindia567
1

Explanation:

The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.

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