Question

Distinguish between the structural differences of arteries and veins? (3marks question)

Answer 1

Answer:

see the attachment...

Answer 2

Veins have a relatively thin layer of smooth muscle in the wall, and often the veins have a misshapen or collapsed look, whereas arteries maintain a tight cylindrical shape. 

Veins also have valve flaps to keep the blood from moving backward in the vessel.

These valves resemble the semilunar valves of the heart.

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