Question

3 A contraction of the heart is called
and to its relaxtion is called​

Answer 1

Answer:

contration is called beat and relaxation is relief

Answer 2

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.