All amphibians are cold-blooded creatures that live part of their life in the water and part on land. Amphibians are unique for being the only vertebrates that undergo metamorphosis as they mature.
Like humans, reptiles are vertebrates. This means that they have a backbone. Reptiles are members of the animal class Reptilia. Reptiles are also cold-blooded. This means that a reptiles body temperature varies depending on its location.