How many valves are in the human heart?
Quick Answer
The human heart has four valves. They act like one-way gates to keep blood flowing in the correct direction.
The Full Story
There are four heart valves: the tricuspid valve, pulmonary valve, mitral valve, and aortic valve. The tricuspid valve sits between the right atrium and right ventricle, while the pulmonary valve leads to the lungs. On the left side, the mitral valve separates the left atrium and left ventricle, and the aortic valve sends blood into the aorta. These valves open and close with pressure changes in the heart and are heard as the familiar heartbeat sounds. If a valve becomes narrowed or leaky, blood flow can be affected significantly.
Key Facts
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Suggested video title for this topic:
"Four tiny gates keep your blood moving the right way—here’s how."
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