Blood is supplied to the myocardium by

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The myocardium is the muscular tissue of the heart, and it is supplied with blood by the coronary arteries. These are the first branches off the aorta, and they run along the heart's surface, branching out into smaller vessels that supply the myocardium with oxygen and nutrients. The coronary sinus is a vein that collects deoxygenated blood from the heart muscle and returns it to the circulation. Blood in the pumping chambers (ventricles) does not supply the myocardium directly. Arteries branching from the pulmonary arteries do not supply blood to the myocardium, as they carry deoxygenated blood from the heart to the lungs.

Blood Is Supplied to the Myocardium by