Duodenum, Mucosa and Submucosa
The duodenal mucosa is typical of the small intestine, except that the crypts receive ducts from the underlying submucosal glands.
The duodenum is distinguished from 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 muscularis mucosae can be seen at the boundary between the mucosa and the submucosa.
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Last updated: 30 January 2002 / dgk