alleryIn the rabbit heart, the left auriculoventricular aperture is guarded by which valve?
ABicuspid valve
BTricuspid valve
CSemilunar valve
DIleocaecal valve
Answer & Solution
Correct answer: A. Bicuspid valve
1. Each auriculoventricular opening in the rabbit heart has a guarding valve.
2. The right opening is guarded by a tricuspid valve.
3. The left opening is guarded by a bicuspid or mitral valve.
4. So the left aperture has the bicuspid valve.
5. Option B tricuspid valve guards the right side, the trap if sides are swapped.
6. Option C semilunar valves guard the pulmonary artery and aorta, so they are wrong.
7. Option D ileocaecal valve belongs to the gut, not the heart.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 13 Structural Organisation of Animals "Circulatory System", p.202_
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