part_of part of part of lymphocyte lymphocyte of small intestine lamina propria gastrointestinal tract (lamina propria) lymphocyte of small intestine lamina propria lymphocyte of small intestine small intestine lamina propria lymphocyte A lymphocyte that resides in the lamina propria of the small intestine. Lamina propria leukocytes and intraepithelial lymphocytes are the effector compartments of the gut mucosal immune system. Lymphocytes circulate through gut associated lymphoid tissues until recruitment by intestinal antigens. They are involved in the gut immune response. lamina propria of small intestine