Dictionary of Human Evolution and Biology

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Aggregations of lymphatic tissue in the throat. There are three pairs of tonsils. The palatine tonsils are a common site of infection and are located laterally beneath the epithelial lining of the mouth; the pharyngeal tonsils (adenoids) are on the posterior wall of the pharynx; the lingual tonsils are at the posterior of the tongue. All help the body fight infections and are part of the lymphatic system.

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