digestive system: 1 palate, 2 salivary glands, 3 tongue, 4 epiglottis, 5 esophagus, 6 stomach, 7 liver, 8 gallbladder, 9 pancreas, 10 duodenum, 11 jejunum, 12 ileum (10, 11, and 12 comprise the small intestine), 13 cecum, 14 ascending colon, 15 transverse colon, 16 descending colon, 17 sigmoid colon, 18 rectum (13-18 comprise the large intestine), 19 anus, 20 vermiform appendix