EVERYDAY SCIENCE

Detailed explanation-1: -Broken bones usually heal and get strong again, but not always. When broken bones don’t heal back together it is call non-union, and that can cause a lot of problems.

Detailed explanation-2: -Fractures to major bones often heal slowly or incompletely, especially in older people, and large bone injuries do not repair naturally. By comparison, rib bones show an unusual capacity to regrow and repair themselves even when a large portion is damaged.

Detailed explanation-3: -Soon after a fracture occurs, the body acts to protect the injured area, and forms a protective blood clot and callus around the fracture. New “threads” of bone cells start to grow on both sides of the fracture line. These threads grow toward each other.

Detailed explanation-4: -In the first few days after a fracture, the body forms a blood clot around the broken bone to protect it and deliver the cells needed for healing. Then, an area of healing tissue forms around the broken bone. This is called a callus (say: KAL-uss). It joins the broken bones together.

Detailed explanation-5: -Provided that the conditions are right for the break to heal completely, a broken bone or fracture can actually repair itself. After a fracture, a blood clot forms around the break. Then, bone cells begin to form on the sides of the fracture line, moving towards the center of the break, until the break heals.