skeletal structure, osteoporosis, bone density, medical illustration, detailed anatomy, cross-section view, healthy bone vs. brittle bone comparison, educational diagram, close-up, high-resolution texture, realistic rendering, 3D model, scientific accuracy, bright clinical lighting, anterior view, lateral view, microscopic level, trabecular meshwork, cortical bone, marrow cavity, osteocyte, osteoblast, osteoclast, calcium deposits, biomedical visualization, informative, no people, isolated on white background.