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.
Among the lower chordates (acraniates) the endoskeleton is a long axial structure called a cord. In vertebrates the endoskeleton is divided into the axial skeleton, the skull (the bony framework of the head), and the skeleton of the extremities.n animals and humans, the collective hard tissue that supports the body and protects it from mechanical injury. There are external and internal skeletons. Most invertebrates have an external skeleton, usually in the form of a shell or cuticle.