How do fishes do gas exchange?

by Mohammadd
(Doha)

Fishes have a pair of kidneys that filtrate the blood. Bony fishes excrete nitrogen as ammonia, NH3, (they are ammoniotelic) and cartilaginous fishes excrete urea as nitrogen waste (they are ureotelic, like adult amphibians and mammals).

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Fishes
by: Biology teacher

Study Fish Facts.

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