Respiration in cartilaginous fishes
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Respiration in Cartilaginous Fishes:
Five pairs of gill slits are present in cartilaginous fishes that open directly to the outside.
They have a long septum, which looks like a sheet and is supported by the gill array.
Lamellae is present along the gill septum.
Fishes breathe by sucking water through the opening known as spiracle instead of their mouths. This spiracle contains a small pseudobranch, which takes only oxygenated blood from the gills.
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Answer: Respiration in cartilaginous fishes: Five pairs of gills slits are present in
Cartilaginous fishes that open directly to the outside. Respiration in fishes takes place via gills, that highly vascularized organs specialized in gas exchange underwater.
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