ulcerative colitis types infographics including proctitis distal colitis pancolitis proctosigmoiditis subtotal colitis

intestine colitis ulcerative digestive medical bowel colon health anatomy disease gastrointestinal inflammation medicine illustration digestion organ system vector intestinal human tract care pain diagnosis internal diarrhea inflammatory large biology healthy science background graphic chronic illness syndrome ulcer cancer colonoscopy gut isolated abdomen appendix diagram bacteria design doctor healthcare rectum crohn