The rumen is the first chamber of the ruminant stomach. It is the largest chamber and has regular contractions to move food around for digestion, eliminate gases through [[Eructation - Anatomy & Physiology|eructation]] and send food particles back to the mouth for [[Mastication|remastication]]. | The rumen is the first chamber of the ruminant stomach. It is the largest chamber and has regular contractions to move food around for digestion, eliminate gases through [[Eructation - Anatomy & Physiology|eructation]] and send food particles back to the mouth for [[Mastication|remastication]]. |