Tags: Anatomical Structure.

Peyer’s patches (or aggregated lymphoid nodules or occasionally PP for brevity) are organized lymphoid nodules named after the 17th-century Swiss anatomist Johann Conrad Peyer. They are aggregations of lymphoid tissue that are usually found in the lowest portion of the small intestine the ileum in humans; as such they differentiate the ileum from the duodenum and jejunum. The duodenum can be identified by Brunner’s glands. The jejunum has neither Brunner’s glands nor Peyer’s Patches.

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