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)

Macrophage (TEM view) (phagocytotic cell)

Foreign Body Giant Cells. AKA Multinucleated Giant Body Cells

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

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

Unilocular Adipocyes

Multilocular (brown) fat cells

Multilocular Adipocytes (LM, H&E stain)

Multilocular Adipocytes (TEM)

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

Plasma cell - antibody production

White blood cells

Connective Tissue Embryonic Origins

Plasma cell (LM), clockface heterochromatin.

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Plasma Cell

Mucosa = Epithelium + Lamina propria

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Multilocular adipocyte

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Mucous glands (exocrine glands, arrows = lumen)

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