Chapter 12 The locomotor system/Fig 12.31.jpg

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Normal joint structure. (A) Structure of a synovial joint (knee). (B) Articular cartilage is a smooth-surfaced material covering the bone ends. Small uniform chondrocytes lie in lacunae within a hyaline matrix. (C) In health, the synovial membrane consists of fibrovascular tissue covered by a thin layer of flattened cells, which on ultrastructure can be shown to be a mixture of fibroblasts and histiocytes.