Biology for IGCSE & O level - Transport In Animals (Section 2 - No. 49)
What is the function of the semilunar valves?
Preventing backflow into the atria
Preventing backflow into the ventricles
Controlling the heart rate
Regulating blood pressure
Explanation
Semilunar valves prevent blood from flowing back into the ventricles from the arteries (pulmonary and aorta).
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