What happens to the flow of blood into the ventricles during atrial systole?

What happens to the flow of blood into the ventricles during atrial systole?
  1. Decreases
  2. Increases
  3. No change
  4. Fluctuates

Solution

During atrial systole, the simultaneous contraction of both atria increases the flow of blood into the ventricles by about 30%.

Asked in: NCERT

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