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Physical and chemical digestion begins in the mouth with the teeth and tongue, and the addition of saliva to the food. The stomach breaks down the food into simpler substances, which are treated with bile from the liver and pancreatic fluid when it reaches the small intestine. The hairlike villi there carry the nutrients into the bloodstream. Bacteria in the large intestine release some nutrients, along with vitamins, that are absorbed along with water. The colon (end of the large intestine) serves as the last stop in fluid reclamation before wastes are excreted through the anus.

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Richie Adams

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2y ago

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