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Heart & Blood Vessels: Your Coronary Arteries. The heart receives its own supply of blood from the coronary arteries. Two major coronary arteries branch off from the aorta near the point where the aorta and the left ventricle meet. These arteries and their branches supply all parts of the heart muscle with blood. Left Main Coronary Artery (also called the left main trunk)
From the descending aorta, the blood travels from various arteries to the rest of the body. The aortic root is the first section of the aorta, which is the largest artery in the human body. It is located within the chest cavity, behind the left half of the sternum. The root of the aorta begins at the aortic annulus, where the right and left coronary artery connect to the aorta, and ends at the limit of pericardium.