Ileum, Peyer’s Patch

Peyer’s patches (or aggregated lymphoid nodules) 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.

NYU virtual histology, Ileum Peyer’s patch

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