While the circulatory system is busy providing oxygen and nourishment to every cell of the body, let's not forget that the heart, which works hardest of all, needs nourishment, too.
Coronary circulation refers to the movement of blood through the tissues of the heart.
The circulation of blood through the heart is just one part of the overall circulatory system . Serious heart damage may occur if the heart tissue does not receive a normal supply of food and oxygen. The heart tissue receives nourishment through the capillaries located in the heart.