The exchange of gas and gum as an organ in the gas exchange system with some style. With moisture and is part of the epidermis layer to allow gas exchange occurs across the walls of the gums. The larvae of fish, some of them and they are amphibians with Gill outside the body. The fish section is full of teens, there will be a body within the gums to Exchange gases through the walls of the gums is a very effective method.
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