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How does a gill on a fish work?

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Anonymous

13y ago
Updated: 8/20/2019

Its a simple closed circuit system. The blood flows through the fish body passing through the gills where the gills siphon out dissolved oxygen from the water. The oxygenated blood then flows through the fish expending the oxygen and picking up carbon dioxide and expelling it from the gills and picks up more oxygen.

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Wiki User

13y ago

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