fibrous connective tissue associated with outer surface of bone, envelop and tightly adhere to bone
Sharpy’s fibers: anchor periosteum to underlying bone, collagen from outer layer embed into bone........ Very important!
Fibrous periosteum: Dense, fibrous, relatively acellular, only FIBROBLASTS are present
- Cellular periosteum: inner layer, loose, less fibrous, more cellular, undifferentiated,
- osteogenic cells (bone precursor cells)à may transform into osteoblasts