Question

Why are arteries thick walled whereas capillaries are thin walled

Answer 1

Arteries are thick walled as they carry blood to the farthest points in the human body to the toes and upto the brain against gravity.
Capillaries are the blood vessel where the exchange of gases takes place and do not takes part in blood circulation , this is the reason they are thin walled.

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Answer 2

Answer:

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Explanation:

That is why arteries have thick walls. Because the heart pumps blood at high pressure. They must be able to withstand the tremendous pressure from a beating heart. Veins have thinner walls because they need more room to hold blood.