intestinal microbiome, bacteria colonizing different parts of digestive system

3d abdomen anatomical anatomy bacteria bacterium bifidobacterium body bowel colon digestion digestive disease duodenal enteric enterococcus flagella flora gastric gastritis gramnegative gut health healthy helicobacter human ileum illustration inflammation inner internal intestine isolated jejunum lactobacillus medical medicine microbiome microflora normal organ pathology probiotic pylori realistic rod science small stomach streptococci system ulcer