Ms. Hernandez, your son needs to pass for a process called endochondral ossification. It is means that the broken bone of your child needs restoring. This process starts with the formation of a hyaline cartilage around the bone. All this process is coordinated by chemical signs. In step one the hyaline cartilage beings to enlarge, chondrocytes increase in size surrounding matrix begins to calcify. After that, chondrocytes become deprived of nutrients and begin to die. In step two the perichondrium surrounding the cartilage differentiate into osteoblast. Perichondrium converts to periosteum, and the osteogenic layer produces a collar around the shaft of the cartilage. In step three capillaries and osteoblasts begin to migrate into the heart
