what part of the lymphatic system is found associated with ileum
1 Peyer's patches: these are clusters of lymphatic nodules in the mucosa that lines the ileum of the small intestine. 2  They play an important role in defending against the large number of pathogens that enter the gastrointestinal system.ymph is a fluid that circulates throughout the body in the lymphatic system. It forms when tissue fluids/blood plasma (mostly water, with proteins and other dissolved substances) drain into the lymphatic system.