JOHN BURBIDGE / SCIENCE PHOTO LIBRARY JOHN BURBIDGE / SCIENCE PHOTO LIBRARY
Light micrograph of human compact bone, which comprises the dense walls of the shafts of long bones. The image shows the organization of compact bone into concentric bony layers (lamellae) arranged around channels containing blood, lymph vessels and nerves (centre). The lamellae and channel form an Haversian system, a number of which appear here in various sections. The Haversian systems are arranged in columns which run parallel to the long axes of the bone. The small dark spots are spaces (lacunae) which house osteocytes, the cells responsible for the maintenance of the bony matrix. Magnification: x320 at 6x4.5cm size, x203 at 35mm size.
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