Block1/Fig 6. Transitional epithelium, H&E.

block1_18.jpg - Fig 6. Transitional epithelium, H&E. Transitional epithelium isa form of stratified epithelium almost exclusively confined to theurinary tract. This epithelium type is so named because it hassome features which are intermediate (transitional) betweenstratified cuboidal epithelium and stratified squamous epithelium.The basal cells are roughly cuboidal; the intermediate cells arepolygonal. The surface cells are larger and rounded. The cellsof the surface layer usually retain several characteristic features:Firstly, the surface cells are large and pale stained and presenta scalloped surface outline. Secondly, the luminal surface of thecells appears thickened and more densely stained. Thirdly, thenuclei of the surface cells are large and round, and often exhibitprominent nucleoli; some surface cells are binucleate.

Fig 6. Transitional epithelium, H&E. Transitional epithelium is a form of stratified epithelium almost exclusively confined to the urinary tract. This epithelium type is so named because it has some features which are intermediate (transitional) between stratified cuboidal epithelium and stratified squamous epithelium. The basal cells are roughly cuboidal; the intermediate cells are polygonal. The surface cells are larger and rounded. The cells of the surface layer usually retain several characteristic features: Firstly, the surface cells are large and pale stained and present a scalloped surface outline. Secondly, the luminal surface of the cells appears thickened and more densely stained. Thirdly, the nuclei of the surface cells are large and round, and often exhibit prominent nucleoli; some surface cells are binucleate.

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