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What are gills?

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First answer by Whyiam. Last edit by Whyiam. Contributor trust: 0 [recommend contributor ]. Question popularity: 0 [recommend question].

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What are the functions of the gill filament the gill arch and the gill rakers?
The gill filaments are the hair-like structures on the gills which absorb the oxygen from the lamallae. The gill arch, on the other hand, acts as a form of muscle which holds the structures of the...
Who has gills?
Fish
Where are gills?
Gills are located in the fish's body, near the slits in its neck. :)
Do gills have their own gills?
no, because then those gills gills would need gills and they would need gills and so on, so on. They have specialised cells instead.
Why do you not have gills?
Land mammals do not have gills because there is no water needed to filter out to get oxygen. Fish have gills because they need to filter out water (and other objects) to get the oxygen to breathe.