What is the main advantage of thin walls of capillaries?
Answer and explanation
Correct answer: Easy exchange of materials
The governing concept is exchange between blood and body tissues. Capillaries have extremely narrow diameters and walls only about one cell thick, so the diffusion distance is very small. Oxygen and nutrients can move from blood to cells, while carbon dioxide and other wastes move into the blood. Thus option A is correct. Colour change, chewing and bone hardening are not functions of capillary walls.
Frequently asked questions
What is the correct answer to this question?
Easy exchange of materials
Why is this the correct answer?
The governing concept is exchange between blood and body tissues. Capillaries have extremely narrow diameters and walls only about one cell thick, so the diffusion distance is very small. Oxygen and nutrients can move from blood to cells, while carbon dioxide and other wastes move into the blood. Thus option A is correct. Colour change, chewing and bone hardening are not functions of capillary walls.
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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