Histology Class

Lymphoid System

Light Microscopy 40: mucosal surface, less extensive lymphoid accumulations 58: collagenous connective tissue capsule, cortex and medulla (made of ? = pg. 198), what is the hilum? Reticulum cells and macrophages (special stain dependent), subcapsular sinus = contains lymphocytes and macrophages, reticulum cells = large, euchromatic nucleus with prominent nucleolus, macrophages throughout – may have abundant lysosomes, outer cortex and perifollicular regions (T cells) = lymphopoiesis, germinal center surrounded by what type of lymphocytes ?, cells in mitotic division in germinal center, medulla: lymphocytes and plasma cells 61: red and white pulp (can see with naked eye), NO cortex and medulla, collagenous connective tissue capsule, spleen filters blood!, white pulp is similar to cortex of lymph node, lymphocytes in white pulp = periarteriolar lymphatic sheath, follicles containing B cells, littoral cells, pulp cords, marginal zone, erythrophagocytosis can be seen among macrophages in pulp cords 63: penicillar arteries in marginal zone 68: lobular arrangement, dark stained cortex (dense lymphocytes = thymocytes), light medulla, capsule and extending septa, mitotic figures, epithelial cells more prominent than lymphocytes in medulla, Hassall’s corpuscles 204: lymphoid nodules in connective tissue 211: penicillar arteries in marginal zone 212: clusters of pale, epithelial-like cells, lymph nodes filter metastatic cells as well as immune cells and lymph fluid. 237: reticulum fibers, white pulp is gray sheath with blood vessels, blood vascular elements 238: lobular arrangement, dark stained cortex (dense lymphocytes = thymocytes), light medulla, capsule and extending septa, mitotic figures, epithelial cells more prominent than lymphocytes in medulla, Hassall’s corpuscles 246: lymphoid accumulations, no afferent lymph system 248: collagenous connective tissue capsule, cortex and medulla (made of ? pg. 198), what is the hilum? Reticulum cells and macrophages (special stain dependent), subcapsular sinus = contains lymphocytes and macrophages, reticulum cells = large, euchromatic nucleus with prominent nucleolus, macrophages throughout – may have abundant lysosomes, outer cortex and perifollicular regions (T cells) = lymphopoiesis, germinal center surrounded by what type of lymphocytes ?, cells in mitotic division in germinal center, medulla: lymphocytes and plasma cells Electron Microscopy EM’s: 6: high nuclear to cytoplasmic ratio of unreactive lymphocytes 8f: high nuclear to cytoplasmic ratio of unreactive lymphocytes

 

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