Â· just now. Report Abuse. It takes a good 6-8 weeks for a break to heal properly. A compound fracture, spiral fracture or complete break would take closer to 8 weeks. A greenstick fracture could heal in as little as 4-6.eport Abuse. Most broken bones begin to heal within 48 hours however depending on the type and severity of the break it could take anywhere from 4 to 8 weeks to completely heal.
Science Main Index. Animals with an internal skeleton made of bone are called vertebrates. Vertebrates include fish, amphibians, reptiles, birds, mammals, primates, rodents and marsupials. Although vertebrates represent only a very small percentage of all animals, their size and mobility often allow them to dominate their environment.
Top 10 amazing movie makeup transformations. An endoskeleton is a bone or cartilage-based skeleton that exists wholly inside of an animalâs body. All vertebrates, including humans, have endoskeletons. Echinoderms â a class that includes starfish and some sea anemones â also have this sort of bone structure.It is characterized by a spine from which bones extend, protecting the animalâs internal organs from within.ll vertebrates, including humans, have endoskeletons. Echinoderms â a class that includes starfish and some sea anemones â also have this sort of bone structure. It is characterized by a spine from which bones extend, protecting the animalâs internal organs from within.