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**Osteoblasts, osteocytes, chondroblasts and chondrocytes are derived from stromal fibroblastic system ('''osteoprogenitor cells'''); osteoclasts from haematopoietic system
**Osteoblasts, osteocytes, chondroblasts and chondrocytes are derived from stromal fibroblastic system ('''osteoprogenitor cells'''); osteoclasts from haematopoietic system
==Structure of Bone==
All mammalian bone is organized as lamellated sheets:
All mammalian bone is organized as lamellated sheets:
*'''Cortical (compact) bone'''
*'''Cortical (compact) bone'''