Prevalence of T-cell system of the immunity is found in the pharyngeal, lingual and palatine tonsils and lymph nodes. B-lymphocytes are much less numerous. Adenocytes consolidation in the structure of "pharyngeal hypophysis" is considered as additional part of the anterior hypophysis. The structure of the mucous membrane in the region of pharyngeal hypophysis is described. This membrane is deprived of protective epithelium and mucous glands.
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