What does the myocardium do?
The myocardium is the thickest layer of the heart made of contractile muscles that pumps blood.
The myocardium is the muscle of the heart. This muscle is supplied by arteries that branch off the aorta. So everytime the heart beats it pushes blood into the aorta and thus into systemic circulation and thus into the heart wall, as well. These arteries that supply the myocardium are called coronary arteries.