Respiratory organ in Scoliodon (Dog fish)

Dog fish is an aquatic animal, it depends wholly upon oxygen dissolved in sea water for respiration. Thus ,respiration is aquatic and carried on entirely by vascular gills.
The respiratory organs of scoliodon consists of 5 pair of gill pouches containing gills.

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Scoliodon and labeo k respiration me difference h ?

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Respected Sir, first of all your lectures are very helpful for us ..thanks a lot .. Sir , in video u told that there are 5 pairs of gills but sir why u didn't count the abranch gill ? Thank you

[@bhoomikaa7361]

I have same doubt..?? And what is the function of abranchial gill

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Not gills ,5 pair of gill clefts.

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Greetings 🌻 Sir u said Dog fish has 5 pairs of gill slits...but acc to dig. it has 6 pairs of gill slits...plss clear it for once

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Are the labellings of mouth open n closed interchanged?? Or is the same?

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