Question

When a fish respires, water flows in through which of the following patterns?

• A. Through the gill slits, over the gill filaments, and out through the mouth
• B. Through the gill filaments, over the gill slits, and out through the mouth
• C. Through the mouth, over the gill slits, and out through the gill filaments
• D. Through the mouth, over the gill filaments, and out through the gill slits

Answer 1

Answer: (C)

Through the mouth, over the gill slits, and out through the gill filaments

Fishes respire via their lungs. They take up oxygen from the water they ingest. For respiration, they take water in through their mouth which then goes over the gill slits and goes out through the gill filaments.

So, the correct answer is 'Through the mouth, over the gill slits, and out through the gill filaments'.