The human skeleton is made of 206 bones. The bones are the hardest material inside our body, give us form and muscles help to move them around, so that we can walk, run, jump and of course do acrobatics. Our bones are very stong but unfortunately kinda brittle. Elder people tend to have brittler bones than younger people. Newborns on the other hand have bones like wax. However, if enough force is applied, bones can break and that's what we call a bone fracture. Find information about common sports injuries at the injuries main page.