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Respiration and Circulation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYRespiration and Circulation2 Marks
Question
Distinguish between:  Atrio ventricular valves and Semilunar valves.
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Answer

Atrio ventricular valvesSemilunar valves
1. Atrio ventricular valves Eire present between the atria and ventricles. On the right side there is tricuspid valve whereas on the left side there is bicuspid valve.1. Semilunar valves are present at the opening of pulmonary artery and systemic aorta.
2. Atrio ventricular valves prevent the back flow of blood from ventricles to atria at the time of systole.2. Semilunar valves prevent the back flow of blood from pulmonary artery and systemic aorta back to the heart.

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