colonoscopy. inside of healthy colon, large intestine.human digestive system

absorption amoebic artwork biology biopsy blockage bowel cancer colitis colon colonoscopy crohn defecation diarrhea digestion digestive disease duodenum flatulence food gastroenterology gastrointestinal graphic gut guts healthy human ileum ill illustration inflamed inflammation inside intestinal intestine irritated large lifestyle medical morbus organ prevention rectal science syndrome system tract ulcerative ulcerosa