At 5 cm, the axolotl's skin consisted of an epidermis with keratinocytes and a thin, fibroblast-free collagen layer in the dermis, which they named the stratum coniunctum. As the axolotl grew ...

Thick keratin layer would restrict oxygen exchange and water absorption. Amphibians have many mucus glands to reduce water loss. As a result of this skin, they are restricted to moist, humid habitats.

The skin contains three layers: The epidermis, dermis and a layer of fatty tissue. Structures within these layers are involved in thermoregulation. Sweat glands in the dermis release more sweat ...