HISTOLOGY AND HISTOCHEMISTRY OF THE NASOPHARYNGEAL TONSIL OF SHEEP PAWAN KUMAR1 and S. K. NAGPAL
نویسندگان
چکیده
The nasopharyngeal tonsil of sheep having pseudostratified columnar ciliated epithelium with goblet cells was modified into follicle associated epithelium at places and contained M cells. The lamina propria submucosa had a dense distribution of lymphoid tissue mainly in the form of lymphoid follicles having different sized lymphocytes, plasma cells and macrophages. High endothelial venules were observed towards parafollicular areas. The goblet cells of the respiratory epithelium and mucus glands distributed in the deeper part showed strong PAS and Alcian blue reaction for glycogen, acidic mucopolysaccharides. The morphological and histochemical featutres of the sheep nasopharyngeal tonsil indicates that it is a component of mucosa associated lymphoid tissue.
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