Intestine, Small

**Definition:** The portion of the GASTROINTESTINAL TRACT between the PYLORUS of the STOMACH and the ILEOCECAL VALVE of the LARGE INTESTINE. It is divisible into three portions: the DUODENUM, the JEJUNUM, and the ILEUM.

**Tree numbers:** - A03.556.124.684

**Synonyms:** - Small Intestine