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DIGESTIVE SYSTEM Digestive System Function • The function of the digestive system is the breakdown organic polymers and acquisition of organic monomers Organic Breakdown • The process of organic breakdown is separated into 1. Mechanical Processing 2. Secretion 3. Digestion Mechanical Processing • Mechanical processing occurs in the oral cavity through the action of teeth and tongue changing food to the bolus that enters the pharynx • Some processing continues in the muscular stomach Secretion and Digestion • Digestive enzymes that breakdown the four classes of organic molecules are secreted into the mouth, stomach, and small intestine where they act on those molecules Organic Acquisition • The process of organic acquisition occurs in the small intestine • Water absorption occurs mainly in the large intestine