Science

What are the four valves of the heart?


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The mitral valve and tricuspid valve control blood flow from the atria to the ventricles. The aortic valve and pulmonary valve control blood flow out of the ventricles.

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The four valves in the mammalian heart are: The two atrioventricular (AV) valves, the mitral valve (bicuspid valve), and the tricuspid valve, which are between the upper chambers (atria) and the lower chambers (ventricles).

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