woman holding human colon anatomy model. colonic disease, large intestine, colorectal cancer, ulcerative colitis, diverticulitis,

colon cancer colorectal colitis disease bowel digestive ulcerative tumor pain colonic march gastroenterologist large system intestine crohn adhesions human rectum anatomy appendicitis ascending bacterial day descending digestion diverticulitis diverticulosis ache enteritis gastrointestinal health healthcare illness infections woman internal world irritable medical model doctor hospital syndrome month pathology polyp science sigmoid