What is the main importance of blood capillaries?
Answer and explanation
Correct answer: To allow exchange of materials
Capillaries are microscopic blood vessels that connect arterioles and venules. Their walls are only about one cell thick, so oxygen and nutrients can diffuse from blood into tissues, while carbon dioxide and other wastes move into the blood. This makes option A correct. Bones are formed by bone tissue, chewing is performed by the mouth and teeth, and filtering inhaled air is mainly associated with nasal structures.
Frequently asked questions
What is the correct answer to this question?
To allow exchange of materials
Why is this the correct answer?
Capillaries are microscopic blood vessels that connect arterioles and venules. Their walls are only about one cell thick, so oxygen and nutrients can diffuse from blood into tissues, while carbon dioxide and other wastes move into the blood. This makes option A correct. Bones are formed by bone tissue, chewing is performed by the mouth and teeth, and filtering inhaled air is mainly associated with nasal structures.
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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