Small Intestines is the part of GI Tract that lies between the stomach and Large Intestines. It can be further divided into Duodenum, Jejunum and Ileum. Watch this video if you want to learn the Gross Anatomy of small intestines. Timeline: 00:00 Introduction 03:05 Plicae Circulares and villi 04:30 Duodenum 07:30 Sphincter of Oddi 13:02 Jejunum 15:38 Ileum 18:38 Enteric Nervous System 19:50 Ileocaecal Valve