#gastroint

Peyer’s Patches are aggregate lymphoid tissue, of M cells, which basically moniter the intestine and sample any antigens to immune cells.

M cell present to:

mast cell which innervates the blood i think

macrophages --> T cells --> cytokine --> T cells --> B cells--> antibody production

has thinner mucous so it is easier to sample

inappropriate activation = chronic inflammation 

B cells when stimulated secrete IgA