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Follicles and PP are the inductive site for the mucosal immune response. Micrograph of a human ileal lymphoid follicle stained with hematoxylin & eosin. The follicle is covered by M-cells which form the follicle-associated epithelium (FAE). Underneath the dome area which holds dendritic cells, is a B cell follicle, surrounded by a T cell-rich zone. Adjacent to the follicle are microvilli. LP = lamina propria.
