Question

One complete contraction and relaxation of the heart.

Answer 1

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.

Explanation:

Answer 2

● One complete contraction and relaxation of the heart is called Cardiac Cycle.