324Lecture6 CT - Connective Tissue Connective Tissue Forms...

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Connective Tissue
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Connective Tissue Forms: fascias, capsules, sheaths, septa, tendons, ligaments, basement membranes, bone, blood, cartilage. Functions: a) connection and support b) Mononuclear Phagocytic System (MPS) c) temperature control d) nutrient distribution e) tissue repair, etc.
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Anatomical Characteristics a) small number of total cells in tissues b) several different cell types. c) predominance of matrix and fibers
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Fibers 1) Collagenous (White) - most common, appear white in the living state, composed of 28 types. Collagen makes up approx. 25% of the protein which is approx. 20-25% of human body weight. very inelastic, resists stretching Fibers: 1 - 100 μ m thick, most 1-10. Fibrils: 0.5 μ m thick Proto fibrils: 10 – 100 nm
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Collagen Fibers (100,000X)
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secreted by fibroblasts
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Collagen Congeals forming gelatin, digested by pepsin. Increases in quantity and distribution with age. Too little (e.g. Vitamin C Deficiency) = scurvy.
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324Lecture6 CT - Connective Tissue Connective Tissue Forms...

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