One of the most essential parts of our bodies is our backbone. this is the set of bones that runs along the center of our back , connecting to our brain at the top. All living species that have a backbone are called vertebrate.All mammals,birds and most reptiles are in the vertebrate category. this even includes fish with bones.The backbone is sometimes called a spinal column.It runs down the back of the animal and protects and supports the nerves inside. this just like a plastic pipe protecting electrical cables inside your home. without this protective backbone, our nerves that connect with our muscles, arms and legs cloud easily be damaged