Q.

Regarding the heart valves:

A. the aortic valve usually has two semilunar cusps
B. the pulmonary valve is at the level of the 3rd costal cartilage
C. they do not contain elastic fibres
D. the tricuspid valve has anterior, posterior and medial cusps
E. the mitral valve cusps are bigger and thinner than those of the tricuspid valve
Answer» B. the pulmonary valve is at the level of the 3rd costal cartilage
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