From the introduction: Amphibians are poikilothermal animals that live in both land as well as water. Amphibia is a Greek word amphi=two and bios=life. Frogs, toads, salamander and caecilians are amphibians. They are characterized by two pair of limbs, absence of scales and three-chambered heart. Respiration is by skin, gills, or lungs. Adult frogs are carnivorous in feeding habit and play a very important role in the food chain of the ecosystem. They are good ...
