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Question

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.

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Solution

(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.

Arteries are blood vessels that carry blood away from the heart to other tissues. The arteries are the first blood vessels that the heart pumps blood through, they experience the highest blood pressure, so they have thick elastic walls to withstand the high pressure. These large arteries expand when the pressure of the blood rises and then recoil when the heart relaxes between the beats to provide a smooth flow of blood throughout the body.


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