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Summary Information: Tonsils. Tonsils: The tonsils are structures of the immune system located in the pharynx and throat. The tonsils protect the body from potential infection of invading pathogens into the respiratory system and the digestive system. They possibly play a role in fighting pharyngeal infections and upper respiratory infections.
Definition: Tonsils are part of the lymph system of the body, part of the immune system. They help the immune system fight infection, but are subject to becoming infected themselves, especially in childhood. There are three sets of tonsils in the back of the mouth: the adenoids, the palantine and the lingual tonsils. These tonsils are found in pairs, one on each side of the body, and are typically small in size. They are made up of lymphatic tissue, a type of tissue that helps filter infection and bacteria from the body.