Notes
The duodenum has a mucosa which is typical of the small intestine (except that the crypts receive ducts from the underlying submucosal glands).
In contrast, the duodenum has a very distinctive submucosa which is distinguished from submucosa in other regions of the small intestine by the presence of submucosal Brunner's glands. These mucous glands pack the submucosa so completely that the typical submucosal connective tissue is obscured.
The thin muscularis mucosae can be seen at the boundary between the mucosa and the submucosa.
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Comments and questions: dgking@siu.edu
SIUC / School
of Medicine / Anatomy / David
King
https://histology.siu.edu/erg/GI029b.htm
Last updated: 17 May 2022 / dgk