Unabsorbed food moves into the large intestine, where its walls absorb additional water from the material.
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Unabsorbed food moves into the large intestine, where its walls absorb additional water from the material.
Unabsorbed food in the digestive process, including indigestible fibers and certain waste materials, proceeds to the large intestine. In the large intestine, water absorption and microbial fermentation occur. The gut microbiota break down remaining complex carbohydrates and produce gases and short-chain fatty acids. Water is absorbed, transforming the material into a semisolid form known as feces. The formed feces are stored in the rectum until eliminated through the anus during defecation. This final stage of digestion and waste elimination ensures the extraction of water and residual nutrients while expelling indigestible components, completing the digestive process.