Brunners glands are seen in -

B i.e., Upper duodenum The presence of mucous duodenal (Brunner's) glands in the submucosa is indicative of upper duodenumQ. These submucosal glands are absent in the jejunum, ileum & the entire large intestine.The histology of lower duodenum, jejunum, and ileum remains similar to that of the upper duodenum. The only differences are.- duodenal glands of Brunner are limited to upper pa of duodenumQ- large aggregates of lymphatic nodules (Peyer's patches) are observed in lower regions of ileumQ