Question

What is the purpose of prolonged contraction of the myocardium

Answer 1

Coordinated contraction of cardiomyocytes causes the heart to contract and expel blood into circulation. The myocardium is thickest in the left ventricle, as the left ventricle must create a lot of pressure to pump blood into the aorta and throughout systemic circulation.

Answer 2

pumping of the blood from the ventricles to the whole body while the relaxation action of the cardiac muscles allows the atrium to receive blood.