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EZ EZ
wrote...
6 years ago
Ventilating the gills by taking water in through the gill openings, as well as using the gill openings for water ejection, is not a very efficient way of doing things. Why, then, do adult lampreys ventilate their gills this way?
 
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wrote...
6 years ago
A lamprey is parasitic, with its mouth affixed to a prey animal to suck blood, so it cannot use its mouth to take in water.
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