ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Compact bone. Light micrograph of a section through human compact bone. This type of bone comprises the dense walls of the shafts of long bones. Compact bone is arranged into concentric bony layers (lamellae) arranged around channels (Haversian canals, seen here as clear areas) containing blood, lymph vessels and nerves. The lamellae and canals form a Haversian system. The Haversian systems are arranged in columns which run parallel to the long axis of the bone. The small black ovals are spaces (lacunae) which house osteocytes, the cells responsible for the mainten- ance of the bony matrix. Differential interference contrast. Magnification: x200 at 6x9cm size.
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