an illustrative depiction of the human digestive system, showcasing the various organs and processes involved in breaking down foo

human digestive system organs stomach intestines esophagus liver pancreas gallbladder digestion absorption nutrients food process biology anatomy alimentary canal gastrointestinal tract diagram medical health enzymes acid small intestine large colon rectum anus mouth teeth saliva peristalsis chyme villi microvilli bile waste excretion feces metabolism energy nutrition body generative ai