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Small Intestine: Gross Anatomy Major organ of digestion and absorption 2–4 m long; from pyloric sphincter to ileocecal valve Subdivisions Duodenum (retroperitoneal) Jejunum (attached posteriorly by mesentery) Ileum (attached posteriorly by mesentery)
Digestive System B Anatomy and Physiology from small intestine to anus -  ppt video online download