Arteries are

thin-walled and blood flows in them under less pressure

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thick-walled and blood flows in them under more pressure

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thin-walled and engage in exchange of substances in the tissues

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none of the above

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Solution

The correct option is B thick-walled and blood flows in them under more pressure
Arteries are thicker than the veins as they have to bear extra pressure of blood as compared to veins and capillaries. Hence they are thick walled.

Veins are thin-walled and engage in exchange of substances in the tissues.

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Similar questions

Q. Blood in arteries flow under high pressure. Therefore, they have _______ and elastic walls.

Q. Blood in arteries flow under high pressure. Therefore, they 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.

Blood in the arteries flow with _______ pressure than blood in the veins. Therefore,the walls of the arteries are ________ than veins.

Q. Blood flows in arteries in spurts and is under pressure. Give reason.

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