Amphibians are vertebrates, meaning they have a backbone. Reptiles, mammals, and birds have backbones, but they don't share other amphibian characteristics.

Do amphibians have backbones and skeletons?

Amphibians have a backbone and an internal skeleton made of bone. They are vertebrate animals like birds, mammals, and reptiles.

Do frogs have backbones?

Only nine vertebrae make up the frog's backbone, or vertebral column. ... The frog has no ribs. The frog does not have a tail. Only a spikelike bone, the urostyle, remains as evidence that primitive frogs probably had tails.