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Structure of human articular cartilage. This figure illustrates a sample of human cartilage from a tissue microarray developed by the Cooperative Human Tissue Network (CHTN) [22] of the National Cancer Institute [23]. Cartilage is predominantly an avascular, aneural and alymphatic load-bearing connective tissue consisting of a single cell type known as the chondrocyte. Blood vessels are only present in subchondral bone.
