Mucosa-associated lymphoid tissue

The mucosal immune system, or MALT mucosa associated lymphoid tissue (called GALT (gut) in the GIT), in the BALT (bronchus) airways) is lymphoid tissue in the mucosal or submucosal ligaments.
 * d-MALT – diffuse lymphoid tissue (cells are scattered in the mucous membrane or submucosa);
 * o-MALT – organised lymphoid tissue (cells are arranged in lymphatic follicles, which can be separate (folliculi lymphatici solitarii) or pooled into so-called Peyer plaques (folliculi lymphatici aggregati)).

Above the lymphatic follicles, the intestinal wall is covered with FAE (follicle-associated epithelium), which contains a large number of M-cells (membrane cells - they endocyte antigens from the intestinal lumen and pass it on to the lymphocytes).

Source

 * PASTOR, Jan. Langenbeck's medical web page [online]. [cit. 2009]. .