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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)
Arteries are blood vessels that carry blood away from the heart to other tissues. These large arteries are under the highest blood pressure and have thick elastic walls. From the large arteries, blood moves into smaller and smaller arteries and then into arterioles, which are less elastic and have more smooth muscle than the large arteries.