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.
Animals that have a backbone are called vertebrates. The backbone is is a column of bones that supports the body, and also protects the spinal cord. The back is made up of many separate bones, called vertebrae. The backbone is part of a vertebrateâs supportive internal skeleton. Most vertebrates have two pairs of limbs. In fish these take the form of fins, but in other vertebrates they are legs, arms, flippers, or wings. Some vertebrates, such as snakes, have no external limbs. Animals with backbones include mammals, birds, reptiles, amphibians, and fish. Vertebrates make up just 3 per cent of all known animal species. Animals and Nature âº The Animal Kingdom âº What is a vertebrate? âº