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-Dominant- [34]

3 years ago

10

(ii) Fish use their gills as a gas exchange surface.

1 answer:

maks197457 [2]3 years ago

4 0

Exchange of gases in fish is very efficient because of: the large surface area of the gills. the large surface area of the blood capillaries in each gill filament. the short distance required for diffusion – the outer layer of the gill filaments and the capillary walls are just one cell thick.

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Tresset [83]

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