is different from humans explain in brief how fish can breathe through gills
Answers
Answer:
Fishes breathe through "gills". But how?
Explanation:
Gills
Fish can breathe underwater by using their gills. By using gills, fish can get oxygen out of the water, just like you get oxygen out of the air.
Gill Arches & Filaments
Fish gills look a little like a row of tiny hairbrushes with the bristles turned towards the outside of the fish's body. The handle and back of the 'hairbrush' are the gill arches, which are stiff, boney supports. All fish have at least three gill arches on each side, but some fish have up to seven. Attached to the gill arches are gill filaments, which are like the bristles of the hairbrush. The filaments are bendable and wave around in the water.
Fish gills: the white part is the gill arch, and the pink things are the gill filaments.
How Gills Work
When you breathe air into your lungs, tiny blood vessels in the lungs take up oxygen from the air and send it to the rest of your body. Fish gills work the same way. The fish takes in water through its mouth, just like you take in air through your mouth. The air passes over its gills, and blood vessels in the gill arches and filaments take up the oxygen and send it to the rest of the fish's body. Then the water passes out through the other side of the gills.
Availability of Oxygen
Fish actually have a tougher job breathing than you do in one way: there's less oxygen in water than there is in the air. For example, if you used your lungs to breathe underwater, you'd have to take 7.5 breaths every single second just to get enough oxygen. That's impossible: try it for yourself and see.
Because water doesn't have a lot of oxygen, fish gills are really good at grabbing all the oxygen they can get. For example, they have a lot more blood vessels than human lungs. Unfortunately, that also prevents fish from breathing on land.