Two main coronary arteries branch off from the aorta, and each of these arteries branches again into yet more arteries that supply oxygenated blood to the different parts of the heart.

• 从主动脉上分出两条主冠状动脉，每条动脉的分支又伸向更多的动脉，以此向心脏各部分提供含氧血液。