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Question

Which organ is used by fish to absorb oxygen from water?


  1. gills   

  2. tracheae 

  3. skin

  4. spiracles


Solution

The correct option is B

tracheae 


Fish takes water into its mouth and forces it to pass through the gill passages. Gills have a lot of blood vessels. As water passes through the thin walls of the blood vessels, it enters the blood and travels to the fish's cells.

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