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Digestion | Articles On Everything
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Digestion is the mechanical and chemical breakdown of food into smaller components that are more easily absorbed into a blood stream, for instance. Digestion is a form of catabolism: a breakdown of large food molecules to smaller ones. To aid in the digestion of their food animals evolved organs such as beaks, tongues, teeth, a crop, gizzard, and others. Teeth (singular tooth) are small whitish structures found in the jaws (or mouths) of many vertebrates that are used to tear, scrape, milk and chew food&...