Question

Explain breathing in fish in brief. [3 MARKS]

Answer 1

Each Point: 1 Mark

1. Fishes breathe through special structures called gills. Gills are present on either side of their heads and are rich with blood vessels.
2. Fishes take in oxygen dissolved in water. During respiration, water enters the body through mouth, passes through gills and comes out of the operculum.
3. Gases are exchanged in the gills. They absorb the oxygen and expel carbon dioxide.