Question

Why do the walls of arteries need to be thick and elastic

Answer 1

Because arteries are the first vessels that the heart pumps blood through, they experience the highest blood pressure, so they have thick elastic walls to withstand the high pressures.

Answer 2

The blood comes from the heart to the arteries with a high pressure and because of this high pressure, walls of the arteries could break. So as to avoid this, walls of arteries need to be thick and elastic.

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