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What is Which of the following is not a Deep Lymphoid tissue and explain in detail?
Mucosa-associated lymphoid tissue (MALT): Small numbers of lymphocytes may be present almost anywhere in the body, but signifi cant aggregations are seen in relation to the mucosa of the respiratory, alimentary and urogenital tracts. These aggregations are referred to as MALT. Mucosa-associated lymphoid tissue in the respiratory system: In the respiratory system the aggregations are relatively small and are present in the walls of the trachea and large bronchi. The term bronchial-associated lymphoid tissue (BALT) is applied to these aggregations. Mucosa-associated lymphoid tissue in the alimentary system: This is also called gutassociated lymphoid tissue (GALT) and includes Peyer's patches of ilium, adenoids (located in the roof of pharynx), lingual tonsils in posterior 1/3rd of tongue, palatine tonsils and lymphoid nodules in vermiform appendix. REF : Inderbir Singh's Textbook of Human Histology, Seventh edition, pg.no., 127, 128.