NEET BIOLOGY

Detailed explanation-1: -A gill (/ɡɪl/ ( listen)) is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist.

Detailed explanation-2: -Aquatic animals like fish have gills as their respiratory organ just like human beings have lungs.

Detailed explanation-3: -gill, in biology, type of respiratory organ found in many aquatic animals, including a number of worms, nearly all mollusks and crustaceans, some insect larvae, all fishes, and a few amphibians.

Detailed explanation-4: -Branchial respiration means respiration through gills. Gills are special vascularised structures that are used as respiratory organs by aquatic arthropods and molluscs.

Detailed explanation-5: -The two animals which breathe through gills are Octopus, Shark, and Fish.