LIFE SCIENCE

Detailed explanation-1: -Peyer’s patches, in the gut, and nasopharynx-associated lymphoid tissue (NALT)-two of the main components of MALT-are important inductive tissues for the generation of mucosal immunity through the ingestion and inhalation of antigen in the intestinal and respiratory tracts respectively1 (Fig. 1).

Detailed explanation-2: -The mucosa of the digestive, respiratory and urinary tracts often contains small aggregations of lymphocytes called lymphoid follicles. These are called ‘Mucosa associated lymphoid tissue’ (MALT). In some cases, these aggregations are large, and confluent. This happens in the tonsils, peyers patches and the appendix.

Detailed explanation-3: -The mucosa-associated lymphoid tissue (MALT), also called mucosa-associated lymphatic tissue, is a diffuse system of small concentrations of lymphoid tissue found in various submucosal membrane sites of the body, such as the gastrointestinal tract, nasopharynx, thyroid, breast, lung, salivary glands, eye, and skin.