PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY "LA SAPIENZA", ROME / SCIENCE PHOTO LIBRARY PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY "LA SAPIENZA", ROME / SCIENCE PHOTO LIBRARY
Compact bone: false-colour scanning electron micrograph of one Haversian system in compact bone. All organic components have been removed from this ground & polished section. Bundles of Haversian systems form the core of compact bone. In each, sheets of calcified bone appear as concentric rings around a central canal, which formerly housed blood vessels & nerves. The smaller elliptical pits (called lacunae) are the locations of the osteocytes, the bone- forming cells. Throughout growth & adult life, compact bone is constantly being reabsorbed and refashioned. Magnification: x300 at 6x7cm size.
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