STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Bone tissue. Coloured scanning electron micrograph (SEM) of a section through an osteoclast bone cell in reabsorbing bone matrix, showing the cell's nucleus (round, centre). Osteoclasts remodel bone by degrading and reabsorbing it in response to growth or changing mechanical stress. A border of complex branching microprojections (thread-like) can be seen anchoring the cell to the bone matrix. Magnification: x2500 when printed 10 centimetres wide.
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