In humans, gas exchange occurs in which part of the lungs?
Answer and explanation
Correct answer: Alveoli
The governing concept is respiratory gas exchange. Alveoli are millions of tiny, thin-walled air sacs surrounded by blood capillaries. Oxygen diffuses from the alveolar air into the blood, while carbon dioxide diffuses in the opposite direction. The trachea, nose and larynx mainly conduct or condition air, so option A is correct.
Frequently asked questions
What is the correct answer to this question?
Alveoli
Why is this the correct answer?
The governing concept is respiratory gas exchange. Alveoli are millions of tiny, thin-walled air sacs surrounded by blood capillaries. Oxygen diffuses from the alveolar air into the blood, while carbon dioxide diffuses in the opposite direction. The trachea, nose and larynx mainly conduct or condition air, so 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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