Question

___________________Outer bony covering that protects the gills.

Answer 1

Gills

• Gills are the respiratory organs of aquatic animals.
• Gills are used in fetching dissolved oxygen from water and excrete carbon dioxide gas.

Operculum

• The operculum is a bony flap in fishes.
• It acts as a protective covering to the gills.
• The operculum opens and closes facilitating the water to pass through the gills.
• Operculum has utility in feeding and respiration.