Question

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Answer 1

Answer:

hey mate !!!!!!

Explanation:

The 'veins carry blood from other parts' of the body to the arteries the organs does not pump the blood and hence the pressure is lower and therefore the veins are thin walled. (c) The valves in the veins are thin because they handle very less pressure of blood that flows from different organs to the heart.

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Answer 2

I. To allow easy exchange of gases

Ii. To prevent damage

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