Histology - Connective Tissue Images Flashcards by N Eberhart

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Mesenchyme

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Mucous Connective Tissue

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Loose (areolar) connective tissue (LCT) - trichrome

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Dense Regular Connective Tissue (DRCT) - H&E

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Dense Irregular Connective Tissue (DiRCT)

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Loose (areolar) connective tissue (LCT) - H&E stain

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Loose (areolar) connective tissue (LCT) - trichrome stain

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Reticular Tissue

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White and Brown Fat

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Loose (areolar) CT

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White Adipose Tissue - H&E

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Elastic Fibers

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Elastic fibers interwoven with collagen fibers.

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(Collagen) Fibrils (f) in cross-section & longitudinal section exhibiting periodicity (68nm).

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Type III Collagen - reticular fibers. Stained black by silver (argyrophilic).

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Reticular fibers in lymph node. Delicate latticework, sliver stain.

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Type VII Collagen. Anchors basal lamina to reticular lamina.

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Fibroblast (LM)

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Fibroblast (TEM)

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Activated fibroblast

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Fibrocyte (quiescent)

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Myofibril

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Activated fibroblast copy

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Macrophage (LM view)

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Macrophage (TEM view) (phagocytotic cell)

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Foreign Body Giant Cells. AKA Multinucleated Giant Body Cells

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Mast cell (LM) central round nucleus, dark granules exhibiting metachromasia.

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Mast Cell (TEM). Central nucleus, filled with electron dense secretory granules.

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Unilocular Adipocyes

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Multilocular (brown) fat cells

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Multilocular Adipocytes (LM, H&E stain)

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Multilocular Adipocytes (TEM)

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Lymphocyte - size of RBC, round nucleus, thin rim of cytoplasm

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Plasma cell - antibody production

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White blood cells

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Connective Tissue Embryonic Origins

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Plasma cell (LM), clockface heterochromatin.

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Plasma Cell

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Mucosa = Epithelium + Lamina propria

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Multilocular adipocyte

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Mucous glands (exocrine glands, arrows = lumen)

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Loose (areolar) connective tissue (LCT) - H&E stain