Finger-like extensions of the intestinal wall that increase the surface for absorption common passage for air and food food tube linking pharynx to stomach prevents food from moving back into the small intestine once it enters the large intestine region where protein digestion begins sphincter controlling the movement of food from the stomach into the duodenum organ that receives pancreatic and bile secretions storage structure for bile accessary organ that produces amylase to begin the breakdown of starch in the mouth accessory organ that produces bile the hard portion of the roof of the mouth gland that is located by lifting the stomach 1. gallbladder 2. esophagus 3. ileocecal valve 4. small intestine 5. pancreas 6. salivary glands 7. pharynx 8. pyloric sphincter 9. stomach 10. liver 11. villi 12. hard palate