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.
All vertebrates have an inner skeleton, including a skull, backbone, and ribs. These complex animals vary in size from less than 0.4 in (1 cm) to over 100 ft (30 m) long. Fish are the largest vertebrate group, with more species than all the other groups put together.he skeleton is a strong frame that supports the body and anchors the muscles. Bones such as ribs protect the heart and other delicate parts, and the skull shields the brain. Most vertebrates have bony skeletons, but shark skeletons are rubbery cartilage.