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How do fish breath air?

Answer

Most fish can't . but so long as their gills are wet they can extract oxygen that is dissolved in the water that they swim in. The gills also act to eliminate CO2 and nitrogen wastes (usually ammonia)
Q&A Related to "How do fish breath air?"
Ok the gills of a fish are lined with many red, blood rich cpillaries called filaments. Also as water passes over ther gills, oxygen is aborbed out of the water through the filaments
http://answers.ask.com/Science/Biology/how_does_a_...
Actually all fish breath air! However they do it through gills instead of lungs!
http://www.chacha.com/question/what-fish-can-breat...
Many people are fascinated that fish have the ability to breathe under water. The way a fish does this very complex. This article will explain in simple terms how a fish breathes
http://www.ehow.com/how-does_4565602_fish-breathe....
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Fish have gills that allow them to breathe in the water. The fish takes water in through his gills, just like we breathe air into our lungs. He then filters the ...
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