Question

How do gills help the fish to survive in water?
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Answer 1

Answer:

Fish breathe underwater using the oxygen that is dissolved in water. But to absorb oxygen from water, fish use special organs called gills. ... When the water moves through the gills, the dissolved oxygen from the water passes through the thin walls of gills and blood vessels, and enters the blood

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Answer 2

Answer:

Instead of breathing air, fish must get their oxygen from the water. ... When the oxygen moves throughout the fish's body, it can then diffuse into areas that have too much carbon dioxide. This carbon dioxide will then be carried out of the bodies through the gills. Just like how we breathe out carbon dioxide!

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