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How do fish breathe underwater?

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Rooster Cogburn , Rooster Cogburn, answered

  1. Fish use a specialized organ called gills in order to breathe the oxygen dissolved in water. The mouth and throat of a fish force water over the gills. Gills have a lot of blood vessels. The water has a higher concentration of oxygen than the blood.

  2. wonderopolis.org/wonder/how-do-fish-breathe-underwater


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