Which valve allows blood to pass from heart to pulmonary artery?
Correct answer: A. Right Semi lunar valve
- A. Right Semi lunar valve
- B. Left AV valve
- C. Left Semi lunar valve
- D. Right AV valve
Explanation
The right semilunar valve allows blood to pass from the right ventricle of the heart to the pulmonary artery. The right semilunar valve is located at the base of the pulmonary artery, where it meets the right ventricle. It has three cusps, which are crescent-shaped flaps of tissue that open and close to allow blood to flow in one direction. When the right ventricle contracts, the pressure in the ventricle rises and forces the cusps of the right semilunar valve open. This allows blood to flow from the right ventricle to the pulmonary artery. When the right ventricle relaxes, the pressure in the ventricle drops and the cusps of the right semilunar valve close. This prevents blood from flowing back from the pulmonary artery into the right ventricle.
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