Assertion: Arteries have thick elastic walls. Reason: Blood flow in arteries is rapid and at high pressure.
Blood flows at a high pressure through arteries. Hence, it makes sense for arteries to have _______ and elastic walls.
Question 21 Choose the correct statement that describes arteries. (a) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart. (b) They have thin walls with valves inside, blood flows under low pressure and carries blood away from the heart to various organs of the body. (c) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body. (d) They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.
Why arteries have thick, elastic walls, while veins have thin walls?