In addition to the heart having pathways to supply the entire body with nutrients and oxygen, it also supplies itself with the oxygenated blood. The heart is composed of muscles and therefore needs to same amount of oxygen and proteins as the rest of the muscles in the body. The coronary arteries supply the heart with what it needs to stay functional. There are two main coronary arteries which branch from the Aorta. The right coronary artery supplies the right atrium and the right ventricle along with the bottom half of both ventricles and the back of the septum. The entire right side of the heart is supplied by the right coronary artery. The left coronary artery supplies blood to the circumflex artery which sends it to the left atrium and side and back of the left ventricle. It also moves from through the left anterior descending artery which supplies the front and bottom of the left ventricle and the front of the septum.
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