The periosteum, endosteum, and Haversian canals are definitely the resources of pluripotent mesenchymal stem cells that initiate the development in the healing tissues. The bridging callus noticed on radiographs largely occurs through the periosteum. This is because the fractured bone won't protrude out within the pores and skin and expose https://www.theorthopaedicandpainpractice.com/what-is-a-long-bone-fracture/