The contraction of heart is known as

Options :
  1. diastole
  2. pumping
  3. systole
  4. none of the above
Answer and Explanation :-

Answer: Option 3

Explanation:

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We join spokes together in a wheel, but it is the center hole that makes the wagon move.We shape clay into a pot, but it is the emptiness insidethat holds whatever we want.We hammer wood for a house, but it is the inner spacethat makes it livable.We work with being, but non-being is what we use.
-Lao Tzu