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The mouth is part of the digestive system. Your teeth chew the food and the enzymes in your saliva start converting starch to sugar. Then the chewed food (chyme) leaves your mouth and goes down the esophagus to the stomach.

As for the digestive system as a whole, it keeps your mouth and every other part of your body alive. The nutrition extracted by the digestive system is used to feed all the tissues in the body. The circulatory system pumps these nutrients and oxygen though your body so the cells can use them to create energy and stay alive.

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12y ago

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