Q.10. Give reasons for the following:
The muscular walls of ventricles are thicker than the walls of atria.
ii) Arteries have thick elastic walls.
(iii) Veins have valves.
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muscular walls of ventricles are thicker than walls of atrium because ventricles are pumping chambers hence they must be flexible and they must exert more pressure on the oxyganated blood so that it reaches all parts of the body.
Explanation:
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