title: Ultrastructural investigation of osteogenic cells.
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000166:cytology*; D005333:Fetus / Q000033:anatomy & histology; D008854:Microscopy, Electron; D010006:Osteoblasts / Q000648:ultrastructure; D010011:Osteocytes / Q000648:ultrastructure; D010521:Periosteum / Q000166:cytology; D011817:Rabbits; D051381:Rats; D013234:Stem Cells / Q000648:ultrastructure*