Which tissue layer contains cells that can assist in producing new bone to heal a fracture?

Which tissue layer contains cells that can assist in producing new bone to heal a fracture?

• A. Epiphysis
• B. Lamella
• C. Haversian canal
• D. Periosteum

Answer: (D)

The periosteum is the tissue layer that houses cells capable of producing new bone during fracture healing. Its inner cambium (osteogenic) layer contains osteoprogenitor cells that can differentiate into osteoblasts, which lay down new bone matrix. This cellular source is crucial for forming the external callus and accelerating repair, aided by the periosteum’s rich blood supply. In contrast, mature lamellae are layers of existing bone, Haversian canals are vascular/nerve passages inside bone, and the epiphysis refers to the bone’s end region rather than a primary source of osteogenic cells for healing.

The periosteum is the tissue layer that houses cells capable of producing new bone during fracture healing. Its inner cambium (osteogenic) layer contains osteoprogenitor cells that can differentiate into osteoblasts, which lay down new bone matrix. This cellular source is crucial for forming the external callus and accelerating repair, aided by the periosteum’s rich blood supply. In contrast, mature lamellae are layers of existing bone, Haversian canals are vascular/nerve passages inside bone, and the epiphysis refers to the bone’s end region rather than a primary source of osteogenic cells for healing.