00:00When you break a bone, a doctor lines up the two pieces so that they are straight.
00:05Then a cast is wrapped around the body part to keep the bones from moving.
00:09A soft bone replacement forms around the break to help hold it together.
00:13It then creates new tissue using specialized cells to bridge the gap,
00:18fusing the broken ends of the bone together.
00:21Finally, blood vessels travel to help heal the area,
00:24and in time the bone regains its strength.
