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Answer from: zurfluhe
The gills are protected by a gill cover in teleosts and many other fishes but by flaps of skin in sharks, rays, and some of the older fossil fish groups. The blood capillaries in the gill filaments are close to the gill surface to take up oxygen from the water and to give up excess carbon dioxide to the water.
Answer from: Quest
what are the options
Answer from: Quest
the missing space is phylum
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How is the structure of the gills suited to their function in respiration?...
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