Why are artery walls thick and elastic?
Answer and explanation
Correct answer: They withstand high-pressure blood from the heart
Arteries carry blood away from the heart. When the ventricles contract, blood enters them under relatively high pressure. Their thick muscular walls prevent bursting, and their elastic fibres allow them to expand and recoil, helping maintain a smooth flow between heartbeats. Thus option A is correct. The other choices refer to feeding, urinary storage, or plant gas exchange and have no connection with arterial structure.
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What is the correct answer to this question?
They withstand high-pressure blood from the heart
Why is this the correct answer?
Arteries carry blood away from the heart. When the ventricles contract, blood enters them under relatively high pressure. Their thick muscular walls prevent bursting, and their elastic fibres allow them to expand and recoil, helping maintain a smooth flow between heartbeats. Thus option A is correct. The other choices refer to feeding, urinary storage, or plant gas exchange and have no connection with arterial structure.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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