Biology, asked by ayushivam7481, 10 months ago

Expiration of a Bonny fish in biology

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Answered by prithviraj44
1

Answer:

During expiration the mouth closes and muscles raise the floor of the buccal cavity and push in the walls of the operculum. This reduces the internal volume and increases the internal water pressure within the mouth. The opercula open and water is pushed out over the gill surface.

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