Small IntestineN

Small intestine is coiled 6-7 meter tube from pylorus to ileocecal valve divided duodenum C-shaped around pancreas head receiving bile pancreatic ducts, jejunum upper two-fifths major absorption site, ileum lower with Peyer’s patches, highly folded plicae villi microvilli increasing surface 600-fold for nutrient uptake, motility via peristalsis segmentation migrating motor complexes clearing between meals.