Digestive Anatomy KEY M:motility S:secretion ORAL CAVITY AND ESOPHAGUS D:digestion A:absorption M:swallowing.chewing S:saliva (salivary glands),lipase D:carbohydrates,fats(minimal) Salivary gland A:none Upper esophageal sphincter STOMACH Esophagus M:peristaltic mixing and propulsion S:HCI (parietal cells):pepsinogen and gastric lipase (chief cells):mucus and HCO3-(surface mucous cells): gastrin(G cells):histamine (ECL cells) Lower esophageal D:proteins,fats sphincter A:lipid-soluble substances such as alcohol and aspirin Liver SMALL INTESTINE Gallbladder M:mixing and propulsion primarily by segmentation: enzymes;HCO3 and enzymes (pancreas):bile(liver); Pyloric valve S:mucus (goblet cells);hormones:CCK,secretin,GIP, and other hormones Pancreas D:carbohydrates,fats,polypeptides.nucleic acids A:peptides by active transport;amino acids,glucose. and fructose by secondary active transport: fats by simple diffusion;water by osmosis;ions, minerals,and vitamins by active transport lleocecal valve LARGE INTESTINE M:segmental mixing:mass movement for propulsion Rectum S:mucus (goblet cells) D:none (except by bacteria) Anal sphincters A:ions,water,minerals.vitamins produced by bacteriaDigestive Anatomy