IMMUNOLOGY

Detailed explanation-1: -Tonsils are lymphoid tissue aggregates situated near the entrance of the digestive and respiratory tracts and play a key role in our immune system. They act as a front-line defense forming the initial immunological response to inhaled or ingested pathogens.

Detailed explanation-2: -tonsil, small mass of lymphatic tissue located in the wall of the pharynx at the rear of the throat of humans and other mammals. In humans, the term is used to designate any of three sets of tonsils, most commonly the palatine tonsils.

Detailed explanation-3: -Tonsils are clusters of lymphatic tissue just under the mucous membranes that line the nose, mouth, and throat (pharynx). There are three groups of tonsils. The pharyngeal tonsils are located near the opening of the nasal cavity into the pharynx.

Detailed explanation-4: -There are four types of tonsils in humans; palatine, pharyngeal, lingual and tubal. To quickly remember this, you can use the following mnemonic: “PPL have Tonsils", standing for Palatine, Pharyngeal, Lingual, Tubal.

Detailed explanation-5: -The tonsils are small masses of secondary lymphoid tissue located in the pharynx.