Science, asked by mugilatradhurs, 1 year ago

We all know the fact that a object moves.only when external forces act on it but the heart is inside our body WHAT MAKES HEART MOVE AND PUMP BLOOD AT SUCH A HIGH PRESSURE!!

Answers

Answered by pkpplanet

there is a SAnode present in our heart which act as a pacemaker. it make the valves ant auricles and ventricles to contract and relax from time to time.

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