write about exchange of gases in aquatic animals?
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- There are various methods of gas exchange used by animals.
- Gills are thin tissue filaments that are highly branched and folded.
- When water passes over the gills, the dissolved oxygen in the water rapidly diffuses across the gills into the bloodstream.
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Most of the aquatic animals like prawns, fish, tadpoles use gills as the respiratory organs. ... The blood flowing in the capillaries of gills absorb oxygen and gives carbon-dioxide to the water passing over them by diffusion through thin epithelium.
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