
This is a diagram of the human heart. There are 2 main sides of the heart,
the right and the left. The right part of the heart receives blood from the body
and pumps it to the lungs to get oxygen. From the lungs, the blood goes to the
left side of the heart. The left side of the heart then pumps the blood out to
the rest of the body. The heart has valves inside that make sure that blood can
only go one direction and cannot go backwards. The heart is made of muscle and
to contract, it needs oxygen and nourishment as well. This is supplied by the
arteries to the heart which supply blood to the heart. This is a diagram of the
heart with the coronary arteries. There is a right coronary artery and a left
coronary artery. The left coronary artery almost immediately divides into two
big branches, the LAD and the circumflex. So the normal heart usually has 3 main
vessels.
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