a
gills ⇢ operculum ⇢ mouth
b
mouth ⇢ gills ⇢ operculum
c
mouth ⇢ operculum ⇢ gills
d
operculum ⇢ mouth ⇢ gills
Explanation
Correct Option
bNo explanation available
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Discussions (3)
solomonade
8 years ago
when the fish wants to breathe it first close its uperculum and then open its mouth and lowers the floor of the mouth then water containing dissolved oxygen rushes into the fishes mouth the fish then close its mouth and raises the floor of the mouth and the water rushes into the gill chamber and move across the gill filaments
Oxygen in the water then diffuses into the gill filaments while carbondioxide diffuses out of the body into the water
