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Outline the Microscopic Features of Synovial Joints PowerPoint Presentation

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Description : Outline the microscopic features of synovial joints. Joints are classified histologically into two main groups, synovial and non-synovial, both of which show wide morphological variations.

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Published on : Sep 26, 2020 | Views : 1363 | Downloads : 4

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Slide 1-

SYNOVIAL JOINTS
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Objective Outline the microscopic features of synovial joints.
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Introduction Joints are classified histologically into two main groups, synovial and non-synovial, both of which show wide morphological variations.
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Synovial joints
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Synovial joint The articulating bone surfaces are covered by a layer of hyaline cartilage, the articular cartilage. The joint is enclosed within a fibrous joint capsule, which is lined internally by a specialized secretory cell layer, the synovium. Muscles attach to bones via tendons.
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Synovium The inner surface of the capsule of synovial joints is lined by specialized highly vascularized connective tissue membrane, the synovium (S) , which is responsible for the elaboration of the synovial fliud that lubricates the movement of articular surfaces.
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Synovium (H&E LP) The surface of synovium (S) is thrown up into folds and small villi which may extend for some distance into the joint cavity (JC). The synovial tissue contains numerous blood vessels (V) , lynphatics and nerves.
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Synovium (H&E HP)
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Schematic electron micrographs of type A (left) and type B (right) cells of synovium .
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The synovial fluid It represents a highly specialized fluid from the synovial extra-cellular matrix (not primarily a secretion). Its major constitutes are Hyluronic acid and associated glycoproteins which are secreted by the type B synoviocyte. Its fluid component is a transudate from the synovial capillaries. Normal synovial fluid also contains a small number of leukocytes.
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Summary Synovial joints are the most common and most movable type of joints . The articulating bony surfaces are covered with articular cartilage and connected by ligaments lined by synovial membrane.
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Quiz Q: which of the following is the predominant cell in synovium? Type A synoviocyte Type B synoviocyte
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Wheater's functional histology, sixth edition Barbara Young, Phillip Woodford, Geraldine O'Dowd, Paul R. Wheater,2014, ISBN-9780702047473 Junqueira's Basic Histology: Text and Atlas, Fourteenth Edition by Anthony Mescher ISBN: 9780071842709 References
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