EVERYDAY SCIENCE

Detailed explanation-1: -Bone ossification, or osteogenesis, is the process of bone formation. This process begins between the sixth and seventh weeks of embryonic development and continues until about age twenty-five; although this varies slightly based on the individual.

Detailed explanation-2: -Osteoblasts penetrate the disintegrating cartilage and replace it with spongy bone. This forms a primary ossification center. Ossification continues from this center toward the ends of the bones. After spongy bone is formed in the diaphysis, osteoclasts break down the newly formed bone to open up the medullary cavity.

Detailed explanation-3: -After birth, secondary ossification centres then develop in each end of long bones and mesenchymal cells and blood vessels are carried in by periosteal buds. The primary and secondary ossification centres have a thin cartilage between them, called the epiphyseal growth plate.

Detailed explanation-4: -Postnatal Ossification Secondary ossification occurs after birth. It forms the epiphyses of long bones and the extremities of irregular and flat bones. The diaphysis and both epiphyses of a long bone are separated by a growing zone of cartilage (the epiphyseal plate).

Detailed explanation-5: -Hematoma Formation (Days 1 to 5) Fibrocartilaginous Callus Formation (Days 5 to 11) Bony Callus Formation (Days 11 to 28) Bone Remodelling (Day 18 onwards, lasting months to years) 08-May-2022