Functions of MALT(Mucosa associated lymphoid tissue) and GALT

Mucosa associated lymphoid tissue

The mucosa lining the alimentary, respiratory, genito-urinary and other surfaces is exposed to antigens. So these areas have rich collec-tion of lymphoid cells

These lymphoid cells are called Peyer’s patches or scattered isolated lymphoid follicles. These are called as Mucosa associated lym-phoid organs (MALT).

Lymphoid tissues in the gut, ie from the adenoids and tonsils up to the follicles of colon are called Gut associated lymphoid tissues (GALT)

Functions of MALT and GALT

1.     They contain lymphoid and phagocytic cells and a special cell called M cells

2.     Both B and T cells are present

3.     Predominant antibody produced is IgA in the mucosal lining. Oth- ers such as IgG, IgM, and IgE are also produced.

4.    Ig A antibodies provide first line of defense against infectious agents