The ultrastructure of bone.

  • 1 July 1975
    • journal article
    • Vol. 5  (4) , 264-71
Abstract
The ultrastructure of the three specialized bone cells are described in relation to their function. Osteoblasts are the bone forming cells with an abundance of RER and a large Golgi area. Osteoblasts and osteocytes form an integrated cell system connected with each other by cell processes filled with actin-like filaments and joined by specialized cell junctions, probably gap junctions. Osteoclasts resorb bone. Characteristics are multiple nuclei, and abundance of mitochondria, a sparcity of RER and clusters of ribosomes. Lysosomes and vesicles contain hydrolytic enzymes. The resorbing area consists of a ruffled border completely encircled by a clear zone.

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