Anatomy of heart

The heart is a muscular organ that pumps blood throughout the body. It is located in the chest, just behind the sternum (breastbone). The heart has four chambers: the right atrium, the left atrium, the right ventricle, and the left ventricle.

The right atrium is the chamber that receives oxygen-depleted blood from the body and pumps it into the right ventricle. The right ventricle pumps the oxygen-depleted blood to the lungs, where it is oxygenated and returned to the left atrium. The left atrium pumps the oxygenated blood into the left ventricle, which then pumps it out to the rest of the body.

The heart has four valves that regulate the flow of blood through the chambers: the tricuspid valve, the pulmonary valve, the mitral valve, and the aortic valve. The tricuspid and mitral valves are located between the atria and the ventricles, while the pulmonary and aortic valves are located between the ventricles and the blood vessels that carry blood away from the heart.

The heart is surrounded by a sac called the pericardium. The pericardium helps to keep the heart in place and also produces a small amount of fluid that helps to reduce friction between the heart and the surrounding tissues.

The heart has its own blood supply, which is provided by the coronary arteries. These arteries provide oxygen and nutrients to the heart muscle and help to remove waste products.

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