OverviewThe mouth is the origination of the digestive tract. The teeth and salivary glands aid in breaking down food for digestion. The tonsils aid against infections.
Update Date 9/10/2015
Updated by: Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.