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The organ along which food travels from the mouth until the undigested remnants emerge as stools. Mixing and some digestion occur in the stomach where the environment is acidic; most digestion and absorption of nutrients occurs in the small intestine; the large intestine, principally the colon, contains very large numbers of micro-organisms capable of fermenting food components that have escaped digestion in the small intestine.GelA complex solid and liquid food system, interconnected to give a network of intermingled particles.
Source: Biotechnology Glossary