What major purpose do thin capillary walls serve in the body?
Answer and explanation
Correct answer: Exchange of substances between blood and tissues
Capillaries are microscopic vessels connecting small arteries and veins near body cells. Their walls are only about one cell thick, so the diffusion distance is short. Oxygen and nutrients can move from blood into tissues, while carbon dioxide and other wastes move into the blood. This efficient exchange is the purpose described in option A. Capillaries do not pump blood, transport food to the stomach, or control urine release.
Frequently asked questions
What is the correct answer to this question?
Exchange of substances between blood and tissues
Why is this the correct answer?
Capillaries are microscopic vessels connecting small arteries and veins near body cells. Their walls are only about one cell thick, so the diffusion distance is short. Oxygen and nutrients can move from blood into tissues, while carbon dioxide and other wastes move into the blood. This efficient exchange is the purpose described in option A. Capillaries do not pump blood, transport food to the stomach, or control urine release.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
