The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. After the blood is in the left ventricle, it is pumped through the aortic valve out to the rest of the body.

University of Michigan - Ann Arbor

An organ that supplies oxygen and nutrients to the tissues and removes carbon dioxide and other wastes. It also pumps blood throughout the body via the circulatory system.

The Human Heart

The lungs are a pair of breathing organs located within the chest. They remove carbon dioxide from the bloodstream and bring oxygen into the bloodstream.

The Lungs

The Left Atrium

The right atrium pumps deoxygenated blood to the right ventricle and into the lungs.

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