The digestive system is a system that involves digestion and GI tract from the mouth to the anus digestion is the breakdown of food are large molecules to smaller molecules digestion are two ways to digest mechanical (Mechanical. digestion) is food, teeth grinding, making them smaller, but still can not be transformed into a restaurant with large molecules to smaller molecules that can be absorbed by the small chemical (Chemical digestion) is that these foods are digested. a small molecule that down by enzymes in saliva, stomach and small intestine (including the liver) are enzymes in the digestive tract.
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