macro image of the gut structure, intestinal villi and flora on the large intestines surface.

microbiome microbiota gut intestinal flora large intestine microscopic view wall villi bacteria structure surface passage membrane photo picture snapshot digital image macro closeup detail shot high magnification zoomedin extreme illustration science scientific research discovery advancements colon bowel digestive tract system gastrointestinal colonoscopy human beneficial medical microorganism microbe microbiology probiotic