Which organ mainly works for gas exchange in fish?
Answer and explanation
Correct answer: Gills
Fish obtain oxygen from water rather than breathing atmospheric air directly. Water passes over the thin, moist filaments and lamellae of the gills, where dissolved oxygen diffuses into the blood and carbon dioxide diffuses out. This large, well-supplied surface makes gills suitable for aquatic gas exchange. Therefore, option A is correct. Lungs and alveoli are characteristic of air-breathing organisms, while scales do not perform the main exchange.
Frequently asked questions
What is the correct answer to this question?
Gills
Why is this the correct answer?
Fish obtain oxygen from water rather than breathing atmospheric air directly. Water passes over the thin, moist filaments and lamellae of the gills, where dissolved oxygen diffuses into the blood and carbon dioxide diffuses out. This large, well-supplied surface makes gills suitable for aquatic gas exchange. Therefore, option A is correct. Lungs and alveoli are characteristic of air-breathing organisms, while scales do not perform the main exchange.
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.
