A fish swims with the help of fins.
The gills are the breathing organs of fishes that help them breathe.
Swim bladder of a fish helps in maintaining buoyancy and the fish can rise upward or sink downward by increasing or decreasing the amount of gas in the bladder.
The hump of the camel is full of fat which serves as the reserved food. The camel can remain without food for several days and during that period, the fat in the hump serves as a source of energy.
Streamlined body of a bird helps to encounter least resistance while flying in the air.