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Other Terms: Tonsilla lingualis, Tonsille linguale
The lingual tonsils are rounded masses of dense, nodular lymphatic tissue covering the dorsal surface at the base of the tongue. They are in the group of Partially-Encapsulated Lymphatic Organs because they are partially surrounded by connective tissue; this is the only tonsil of its kind. Their surface is covered with stratified squamous epithelium that invaginates into each tonsil as a single crypt. They have mucous glands that are emptied into the crypt by ducts.