What repeats the events described in the cardiac cycle?

What repeats the events described in the cardiac cycle?
  1. The contraction of the ventricles and atria
  2. The relaxation of the ventricles and atria
  3. The SAN
  4. The veins

Solution

The SAN generates a new action potential and the events described in the cardiac cycle are repeated in that sequence.

Asked in: NCERT

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