2. thymus 1)/Structure of thymus capsule: CTinterlobular septum -corteX: dark-staining medulla: lighter-staining consists of thymic epithelial cell thymic stromal cell( ma, eo, mc, fibroblast and myoid cell) and thymocytes
2.thymus 1) Structure of thymus ---capsule: CT→interlobular septum ---cortex: dark-staining ---medulla: lighter-staining ---consists of thymic epithelial cell, thymic stromal cell( ma, eo,mc, fibroblast and myoid cell) and thymocytes
① cortex: thymic epithelial cell(epithelial reticular cell subcapsular epithelial cell /flattened /secret B 2-microglobulin, thymosin and thymopoietin interdigitation dendritic cell /more processes /MHC antigen ---thymocyte: different stages of LC large LC( prethymocyte: superfacial cortex common thymocyte: deep cortex-85-90%
①cortex: ---thymic epithelial cell(epithelial reticular cell): subcapsular epithelial cell: /flattened /secret β 2 -microglobulin, thymosin and thymopoietin interdigitation dendritic cell: /more processes /MHC antigen ---thymocyte: different stages of LC large LC( prethymocyte): superfacial cortex common thymocyte: deep cortex- 85-90%
2)medulla ---epithelial reticular cell medullary epithelial cell: secret thymosin thymic corpuscle epithelial cell thymic corpuscle /spherical or ovoid, 30-50um in D /concentrically-arranged epithelial reticular cells /peripheral cell: inmature near centra: mature /center cell: keratinased-eosinophilic, hyalinised with invading of macrophage, eosinophil and LC /function unknown thymocyte, macrophage
2) medulla: ---epithelial reticular cell medullary epithelial cell: secret thymosin thymic corpuscle epithelial cell * thymic corpuscle: /spherical or ovoid, 30-50um in D /concentrically-arranged epithelial reticular cells /peripheral cell: inmature /near centra: mature /center cell: keratinased-eosinophilic, hyalinised, with invading of macrophage, eosinophil and LC /function: unknown ---thymocyte, macrophage