Question

the rhythmic constration and relaxation of heart is called ​

Answer 1

Answer:

Answer:The cardiac cycle refers to the alternating contraction and relaxation of the myocardium in the walls of the heart chambers, coordinated by the conduction system, during one heartbeat. Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase.

Answer 2

The cardiac cycle is the rhythmic contraction and relaxation of the heart. Contraction is called cardiac systole and Relaxation is called cardiac diastole.

Explanation:

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