Question

Venis are thin walled and have valves.Justify​

Answer 1

Answer:

Arteries carry blood from the heart to various organs of the body under high pressure so they have thick and elastic walls. Veins collect the blood from different organs and bring it back to the heart. The blood is no longer under pressure so, the walls are thin with valves to ensure that blood flows only in one direction.

Explanation:

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Answer 2

Answer:

because blood flow at low pressure .