ANATOMY

Detailed explanation-1: -Even though bones stop growing in length in early adulthood, they can continue to increase in thickness or diameter throughout life in response to stress from increased muscle activity or to weight. The increase in diameter is called appositional growth.

Detailed explanation-2: -Appositional growth is the process by which old bone that lines the medullary cavity is reabsorbed and new bone tissue is grown beneath the periosteum, increasing bone diameter.

Detailed explanation-3: -This is called interstitial growth. The process of appositional growth occurs when the cartilage model also grows in thickness due to the addition of more extracellular matrix on the peripheral cartilage surface, which is accompanied by new chondroblasts that develop from the perichondrium.

Detailed explanation-4: -In endochondral ossification, bone develops by replacing hyaline cartilage. Activity in the epiphyseal plate enables bones to grow in length (this is interstitial growth). Appositional growth allows bones to grow in diameter. Remodeling occurs as bone is resorbed and replaced by new bone.

Detailed explanation-5: -Bone growth is either longitudinal or appositional. Longitudinal bone growth is the ossification of the bone that grows lengthwise until they stop growing. Appositional bone growth continues till death and is the growth of the bones in diameter or thickness.