Question

Do fishes breathe oxygen?

Answer 1

Gills:

1. A gill is a respiratory organ used by many aquatic organisms to collect dissolved oxygen from water and expel carbon dioxide.
2. Respiration is the mechanism by which we get energy from organic substances.
3. Many aquatic organisms employ gills as respiratory organs to take in dissolved oxygen from the water and expel carbon dioxide.
4. Fish have gills to breathe in the oxygen contained in water.
5. When the fish swallows water through its mouth, the act of breathing begins.
6. The water is then ejected after carbon dioxide and dissolved oxygen has been removed from it.
7. It is necessary to have a continual supply of oxygen.