STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Osteoporotic bone, coloured scanning electron micrograph (SEM). This is a close-up of the porous structure inside an osteoporotic bone. Osteoporosis (brittle bone disease) causes a reduction in bone density and an increase in porosity, resulting in increased brittleness and a greater risk of fracture. Magnification: x65 when printed at 10 centimetres wide.
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