Tonsils: Tonsils are lobes of lymphoid tissues which are enclosed in a capsule of connective tissue. There are three types of tonsils: � Pharyngeal tonsils: They are situated in the upper posterior wall of pharynx. Pharyngeal tonsils are also known as Luschka�s tonsils. � Palatine tonsils: They are present between the columns of fauces on both sides of pharynx. � Lingual tonsils: Lingual tonsils are found at the root of the tongue. � Tonsils help to fight infections.