What is the role of SAN in the human heart?

What is the role of SAN in the human heart?
  1. To separate the right and left atria
  2. To prevent backward flow of blood
  3. To initiate and maintain rhythmic contractile activity
  4. To divide into right and left bundle

Solution

The SAN, located in the right upper corner of the right atrium, is responsible for initiating and maintaining the rhythmic contractile activity of the heart. It generates the maximum number of action potentials, approximately 70-75 per minute, and is referred to as the pacemaker.

Asked in: NCERT

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