describe the process of absorption of food in small intestine
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The primary function of the small intestine is the absorption of nutrients and minerals found in food. ... Digested nutrients pass into the blood vessels in the wall of the intestine through a process of diffusion. The inner wall, or mucosa, of the small intestine is lined with simple columnar epithelial tissue.
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The inner wall of the small intestine has adaptation so that substances pass across it quickly and efficiently: it has a thin wall, just one cell thick. it has many tiny villi to give a really big surface area.
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