Biology, asked by ravibamta8, 5 months ago

Write the difference between S.A node and A.V. node?

Answers

Answered by mahek77777

2

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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