Lacunar-canalicular and vascular canal characteristics of the femoral cortical bone in young and aged women. Inter-group differences in (A) LCN area percentage, (B) lacunar area percentage, (C) average lacunae size, (D) lacunae size distribution, (E) lacunae number per area (mm2), (F) canalicular area percentage. Intra-cortical regional differences in (G) vascular canal and (H) LCN area percentages between the periosteal, mid-cortex, and endosteal regions. (* - p < 0.05). Error bars represent SD.