Fish's gills are made up of a gill bar, gill filaments, gill rakers and gill lamellae. The gill filaments are "stacked" along the the gill bar and the gill lamellae stick out of the filaments at right angles. Deoxygenated blood is carried down the gill bar and into the gill filaments. It then flows through the lamellae and back down the other side of the filament, into the gill bar where the now oxygenated blood gets carried off for use. The way oxygen is diffused into the lamellae is through a countercurrent exchange system. The fish takes in water through the mouth, and pushes it over the the gill filaments and lamellae. The direction of blood flow through the filaments and lamellae is in the opposite direction to the water being forced over them. This means that there is always a good diffusion gradient and the maximum amount of oxygen can be absorbed. If the concurrent exchange system was used, whereby the water and blood would flow in the same direction, only about half of the oxygen in the water would be able to be absorbed. The water is now forced back out of the fish through the operculum.
cartilaginous fishes have lamelliform gills. bony fishes have filiform gills.
They swim, they have gills, they live under water, they are sea creatures. They have fins, they travel in schools, they live underwater, and they have scales. Most fishes have gills, fins, and scales. Their skeletons are either made of cartilage and bone. they are cold blooded
yes there are different types of gills in different types of fishes.
No, the fishes breathe through their gills.
Some examples of animals with gills are fish, tadpoles, and marine invertebrates like clams and jellyfish. Gills are respiratory organs that allow these animals to extract oxygen from water.
cartilaginous fishes have lamelliform gills. bony fishes have filiform gills.
The fishes have gills for breathing
Fishes having gills are more. Also some fishes have lungs.
No they have gills
Gills
yes
gills
their gills
Correct
Gills
those are fishes gills
they allow them to breath underwater