Biology for IGCSE & O level - Transport In Animals (Section 3 - No. 35)
Which structure prevents the backflow of blood from the ventricles to the atria?
Semilunar valves
Tricuspid and bicuspid valves
The aorta
The pulmonary artery
Explanation
The tricuspid and bicuspid valves (also called atrioventricular valves) prevent the backflow from ventricles to atria.
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