1. Low-power scanning electron microscope image of normal bone architecture in the 3 rd lumbar vertebra of a 30 year old woman marrow and other cells removed to reveal thick, interconnected plates of bone

2. 0.2 mm Low-power scanning electron micrograph of osteoporotic bone architecture in the 3 rd lumbar vertebra of a 71 yr old woman marrow and other cells removed to reveal eroded bone elements

3. Low-power scanning electron micrograph of osteoporotic bone architecture in the 3 rd lumbar vertebra of a 71 yr old woman marrow and other cells removed to reveal eroded bone elements

4. Trabecular bone element eroded by osteoclasts

5. Scanning electron micrograph of a rat osteoclast and resorption pit on a bone surface