How Do Amphibians Body Covering. They have moist, scaleless skin that absorbs water and oxygen, but that also makes them vulnerable to dehydration (loss of bodily fluids). Mammals are animals that give birth to their young and their bodies are always warm.
The following classification derives from zug, vitt, and caldwell (2001), who presented a composite phylogeny from several studies of different ancient amphibian groups. Amphibians do not have scales and their skin is permeable (molecules and gases can pass through). 5 feathers the only group of animals with feathers as their body covering is birds.
Frogs bear an outer covering of skin, just as humans and many other animals do.
As a result of the continued uncertainty of the relationships of many. Amphibians spend at least part of their lives in water and on land. This means that frogs are able to absorb water without drinking it, exude toxins from their skin, and, in some cases, breathe while under water. Most of the animals known as amphibians can live on land or in water.