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Explain how gills of  a fish are adapted to the process of gaseous exchange.

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  1. Rich blood supply to transport gases;
  2. Thin membrane for faster diffusion of gases;
  3. Presence of a gill arches to support more gill filaments;
  4. Presence of gill rakers to trap solid particles in water.
  5. Very many gill filaments to increase the surface area for gaseous exchange
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