Biology for IGCSE & O level - Transport In Animals (Section 5 - No. 47)
What is the purpose of the semilunar valves?
To control blood flow from the atria to the ventricles
To prevent blood backflow from the ventricles into the atria
To prevent backflow from the arteries into the ventricles
To regulate the heart rate
Explanation
Semilunar valves prevent blood backflow from the arteries into the ventricles.
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