Intestinal gas.
D002245:Carbon Dioxide / Q000032:analysis; D004884:Eructation / Q000503:physiopathology; D005414:Flatulence / Q000235:genetics / Q000503:physiopathology; D005740:Gases / Q000032:analysis; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D007422:Intestines / Q000502:physiology*; D008697:Methane / Q000032:analysis; D009584:Nitrogen / Q000032:analysis
D005740:Gases; D002245:Carbon Dioxide; D006859:Hydrogen; D009584:Nitrogen; D008697:Methane