Cardiac Cycle | Biology | Hindi

The cardiac cycle is the performance of the human heart, beginning from one heartbeat to the beginning of the next.
It consists of two phases:- 1) Diastolic phase, 2) Systolic phase.
In the diastolic phase, the heart ventricles are relaxed and the heart fills with blood.
In the systolic phase, the ventricles contract and pump blood out of the heart and to arteries.
It further proceeds in the following steps:
Atrial systole lasts about 0.1 seconds - both atria contract and forces the blood from the atria into the ventricles.
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