Why are artery walls thicker than vein walls?
Answer and explanation
Correct answer: Because blood flows through them at higher pressure
The governing concept is pressure in the circulatory system. Arteries carry blood away from the ventricles, where it is pumped at relatively high pressure. Their thick, elastic and muscular walls withstand this pressure and help maintain blood flow. Veins return blood at much lower pressure and therefore have thinner walls. Options B, C and D describe functions that blood vessels do not perform. Thus, option A is correct.
Frequently asked questions
What is the correct answer to this question?
Because blood flows through them at higher pressure
Why is this the correct answer?
The governing concept is pressure in the circulatory system. Arteries carry blood away from the ventricles, where it is pumped at relatively high pressure. Their thick, elastic and muscular walls withstand this pressure and help maintain blood flow. Veins return blood at much lower pressure and therefore have thinner walls. Options B, C and D describe functions that blood vessels do not perform. Thus, option A is correct.
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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