In fishes gas exchange is done by direct contact of water with the branchiae (gills). Gases gain and exit the circulation through the gills.
In ***** amphibians gas exchange is done through the moist and permeable skin (cutaneous respiration) and also through the lungs, a set of tiny airway terminations associated to a highly vascularized tissue specialized in gas exchange.
The axolotl is an exotic amphibian found in Mexico that lives in water and “breathes” through gills even as an *****.
