Mucosa - associated lymphoid tissue - wikipedia Mucosa - associated lymphoid tissue `` MALT '' redirects here. For germinated cereal grains, see Malt. Mucosa - associated lymphoid tissue Details System Lymphatic system Identifiers Acronym ( s ) MALT Anatomical terminology ( edit on Wikidata ) 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, oral passage, nasopharyngeal tract, thyroid, breast, lung, salivary glands, eye, and skin. MALT is populated by lymphocytes such as T cells and B cells, as well as plasma cells and macrophages, each of which is well situated to encounter antigens passing through the mucosal epithelium. In the case of intestinal MALT, M cells are also present, which sample antigen from the lumen and deliver it to the lymphoid tissue. There are three types of situations in which MALT is present - Tonsils, Appendix, Small Intestinal area Contents 1 Categorization 2 Role in disease 3 References 4 External links Categorization The components of MALT are sometimes subdivided into the following : GALT ( gut - associated lymphoid tissue. Peyer 's patches are a component of GALT found in the lining of the small intestines. ) BALT ( bronchus - associated lymphoid tissue ) NALT ( nasal - associated lymphoid tissue ) CALT ( conjunctival - associated lymphoid tissue ) LALT ( larynx - associated lymphoid tissue ) SALT ( skin - associated lymphoid tissue ) VALT ( vulvo - vaginal - associated lymphoid tissue ) It can be also distinguished by level of organization of the tissue : O - MALT ( organized mucosa - associated lymphatic tissue ) ; specifically, the tonsils of Waldeyer 's tonsillar ring are O - MALT. D - MALT ( diffuse mucosa - associated lymphatic tissue ) ; MALT that is not organized as a separately macroscopically anatomically identifiable mass, tissue or organ ( such as the aforementioned O - MALT ) is diffuse MALT. Role in disease MALT plays a role in regulating mucosal immunity. It may be the site of lymphoma, usually non-Hodgkin lymphoma. A specific entity is the MALT lymphoma linked to Helicobacter pylori in the stomach. References Jump up ^ Hong Liang ; Christophe Baudouin ; Antoine Labbe ; Luisa Riancho ; Françoise Brignole - Baudouin ( 2012 ). `` Conjunctiva - associated lymphoid tissue ( CALT ) reactions to antiglaucoma prostaglandins with or without BAK - preservative in rabbit acute toxicity study ''. PLoS One. 7 ( 3 ) : e33913. doi : 10.1371 / journal. pone. 0033913. PMC 3307783. PMID 22442734. ^ Jump up to : Gray 's Anatomy, 38ed. p. 1442 ff. External links MALT resource page - Patients Against Lymphoma Maltoma Organs of the lymphatic system Primary organs Bone marrow Hematopoietic stem cell Thymus Hassall 's corpuscles Secondary organs Spleen Structure Hilum Trabeculae Red pulp Cords of Billroth Marginal zone White pulp Periarteriolar lymphoid sheaths Germinal center Blood flow Trabecular arteries Trabecular veins Tonsils Palatine Lingual Pharyngeal Tubal Tonsillar crypts Waldeyer 's tonsillar ring Lymph nodes Lymphatic vessel T cells High endothelial venules B cells Germinal center Mantle zone Marginal zone MALT GALT Peyer 's patch Germinal center Retrieved from `` https://en.wikipedia.org/w/index.php?title=Mucosa-associated_lymphoid_tissue&oldid=819503572 '' Categories : Lymphoid organ Talk Contents About Wikipedia Čeština Deutsch Eesti Español Français Galego Bahasa Indonesia Italiano Magyar 日本 語 Português 中文 Edit links This page was last edited on 9 January 2018, at 18 : 50. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: where are mucosal associated lymphoid tissues present in the human body and why
Answer: in various submucosal membrane sites of the body, such as the gastrointestinal tract,oral passage, nasopharyngeal tract, thyroid, breast, lung, salivary glands, eye, and skin; gastrointestinal tract