Images of trabecular bone in osteoporotic women under TEM. A, B. No osteocytes could be seen in the trabecular bone of femoral head in women with OP. (×3400) (×5800). C. Loose collagen fibrils on the edge of the trabecular bone. (×3400). D. Osteoblasts with depressed function floated on the surface of the bone. (Arrow points to the plasma of the osteoblast) (×7400).