Why heart has valves at all the apertures? Write about the bicuspid and tricuspid valves.

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Solution

The valves in the heart allow the flow of blood only in one direction,i.e., from the atria to ventricles and from the ventricles to the pulmonary artery or aorta.
The opening between the right atrium and the right ventricle is guarded by a valve formed of three muscular flaps or cusps, the tricuspid valve, whereas a bicuspid or mitral valve guards the opening between the left atrium and the left ventricle.

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