In the intra-epithelial region of the mucosa of intestine, the predominant cell population is that of -
Around 15% of the cells in the small intestinal epithelium are lymphocytes. These Intraepithelial lymphocytes (IEL) are virtually all T lymphocytes but, unlike other T cells, most express the CD8 subset marker. The functions of this large population of T cells are unknown.
B cell
T-cells
Plasma cells
Basophils