Term Name: duodenum
Synonyms: proximal intestine, upper intestine
Definition: The first part of the small intestine. At the junction of the stomach and the duodenum the alimentary canal is inflected. The duodenum first goes anteriorly for a short distance, turns dorsally, and eventually caudally, thus it is a U-shaped structure with two horizontal sections (a ventral and a dorsal one).
Ontology: Cell Ontology [UBERON:0002114]

Relationships
develops into: pancreatic epithelial bud
is part of: small intestine
has parts: crypt of Lieberkuhn of duodenum duodenal ampulla duodenal epithelium duodenal gland duodenal goblet cell duodenal mucosa duodenum glandular cell duodenum lamina propria enterocyte of epithelium proper of duodenum foregut region of duodenum intestinal villus of duodenum lumen of duodenum mesentery of duodenum microfold cell of epithelium proper of duodenum midgut region of duodenum muscle layer of duodenum muscularis mucosae of duodenum periampullary region of duodenum serosa of duodenum smooth muscle fiber of duodenum submucosa of duodenum
is a type of: subdivision of digestive tract