The sequence of the one-way gaseous exchange mechanism in a fish is

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Biology JAMB 2016

The sequence of the one-way gaseous exchange mechanism in a fish is

  • gills ⇢ operculum ⇢ mouth
  • mouth ⇢ gills ⇢ operculum checkmark
  • mouth ⇢ operculum ⇢ gills
  • operculum ⇢ mouth ⇢ gills

The correct answer is: B

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