Gas is formed in the intestines by the action of bacteria as food is being digested. Gas is also called flatus or flatulence, and is passed through the intestine and out the body through the rectum.
Review Date 5/21/2016
Updated by: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.