How do the skeletons of vertebrates differ from the skeleton of most invertebrates?

The Word vertebrae actually means back bone. so a vertebrate has a back bone, like most mammals, and invertebrate means the animal has no backbone, like insects, crustaceans, and jellyfish
The Word invertebrate means with no backbone, whereas vertebrate means with a back bone. People and most animals are vertebrates and most Spiders and insects are invertebrates.