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Describe how fish are able to breathe underwater using their gills
A fish breathes by first opening its mouth to gulp water in and then opening its gill flaps to let water out.
Explanation:
Gills are feathery organs full of blood vessels. A fish breathes by taking water into its mouth and forcing it out through the gill passages. As water passes over the thin walls of the gills, dissolved oxygen moves into the blood and travels to the fish's cells.
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