Biologymedium · Past Paper
Which valves prevent the backflow of blood from the ventricles into the atria?
ASemilunar valves
BAtrioventricular valves
CAortic valves
DPulmonary valves
✓ Correct Answer: B — Atrioventricular valves
Atrioventricular (AV) valves, including the bicuspid and tricuspid valves, prevent blood from flowing back into the atria.
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