INNERSPACE IMAGING / SCIENCE PHOTO LIBRARY INNERSPACE IMAGING / SCIENCE PHOTO LIBRARY
Compact bone. Polarized light micrograph (PLM) of a section through human compact bone. This tissue is found in the dense walls of the shafts of bones. It forms concentric layers (lamellae, blue, purple and orange) around Haversian canals (purple circles), which contain blood, lymph vessels and nerves. The lamellae and canals together form a Haversian system. Many Haversian systems are arranged in columns running parallel to the long axis of the bone. Osteocytes, the cells responsible for the maintenance of the bony matrix, are housed in spaces known as lacunae (small black dots). Magnification: x50 at 6x7cm size.
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