EVERYDAY SCIENCE

Detailed explanation-1: -Fish take water into their mouth, passing the gills just behind its head on each side. Dissolved oxygen is absorbed from-and carbon dioxide released to-the water, which is then dispelled. The gills are fairly large, with thousands of small blood vessels, which maximizes the amount of oxygen extracted.

Detailed explanation-2: -Aquatic respiration is the term used when fishes breathe. It is the process of gaseous exchange with water by an aquatic organism, receiving O2 from oxygen dissolved in liquid and removing carbon dioxide and other metabolic products into the water. Fish need their gills to breathe and require a steady supply of oxygen.

Detailed explanation-3: -Unlike land animals that have lungs to take in oxygen from air, fish have gills to breathe in the oxygen contained in water. This process of breathing begins when a fish gulps water through its mouth. The water enters the mouth and passes through the feathery filaments in the fish’s gills, which are rich in blood.

Detailed explanation-4: -The two animals which breathe through gills are Octopus, Shark, and Fish.

Detailed explanation-5: -Lungfish have a unique respiratory system, having both gills and a lung. It is the only type of fish to have both organs, and there are only six known species around the world.