Bone growth

Bone growth occurs primarily through a process called ossification, where cartilage is gradually replaced by bone tissue. During childhood and adolescence, bones lengthen at the growth plates (epiphyseal plates), which are areas of new cartilage formation. As new cartilage forms, older cartilage is replaced by bone, making the bones longer. Once growth completes around early adulthood, these plates close, and bones stop lengthening. Bones also grow in thickness through a process called appositional growth, where new bone tissue is added to the outer surface. Overall, bone growth involves a balance of formation and resorption, ensuring healthy development and maintenance.