The valve responsible for preventing backflow of blood from the lungs into the heart.

Question

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The pulmonary semilunar valve is responsible for preventing backflow of blood from the lungs into the heart. When the right ventricle contracts, the pulmonary semilunar valve opens to allow blood to flow into the pulmonary artery and to the lungs for oxygenation. When the ventricle relaxes, the valve closes to prevent blood from flowing back into the heart from the lungs.

The Valve Responsible for Preventing Backflow of Blood from the Lungs