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There are actually four valves in the human heart. The heart has four chambers. The upper two are the right and left atria. The lower two are the right and left ventricles. Blood is pumped through the chambers, aided by four heart valves. The valves open and close to let the blood flow in only one direction.

-The tricuspid valve is between the right atrium and right ventricle.

-The pulmonary or pulmonic valve is between the right ventricle and the pulmonary artery.

-The mitral valve is between the left atrium and left ventricle.

-The aortic valve is between the left ventricle and the aorta.

Each valve has a set of flaps (also called leaflets or cusps). When working properly, the heart valves open and close fully.

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14y ago

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