The ruminant stomach has multiple chambers that allow for the rechewing and breakdown of cellulose. The first chamber, the rumen, is where fermentation occurs. Following the rumen are three additional chambers that further digest food before it reaches the small intestine.

1. IV. Ruminant StomachMultiple chambers allow rechewing and breakdown of cellulosestomachchamber 1: fermentationRumenstomachchamber 2stomachchamber 3stomachchamber 4to small intestine