2. GASTRIOINTESTINAL TRACT FUNCTIONS DIGESTION: transformation of food, absorbable nutrients and compounds mechanical and chemical ABSORPTION: Selective transfer of substances across the intestinal cells PROTECTION: Exclusion of harmful substances EXCRETION: Removal of nondigestable food

3. PRIMARY ORGANS Mouth Esophagus Stomach Small Intestine Large Intestine

4. SECONDARY(ACCESSORY) ORGANS Salivary Glands: digestive enzymes Liver: Make bile and Filters blood Pancreas: Digestive enzymes, Alkaline, and Insulin Gall Bladder: Bile Storage and Alkaline

5. PRIMARY ORGANS Mouth: Digestion: Starch enzymeMaltose

6. PRIMARY ORGANS PHARYNX: canal to esophagus and trachea ESOPHAGUS: “parastalsis” wavelike motion that moves the food down the esophagus

7. PRIMARY ORGANS STOMACH: Holds about 4 cups 2.2 PH Cardiac sphinctor: top of the stomach Pyloric sphinctor: bottom of the stomach Protein enzymesAmino Acids HCL CHYME

8. N UTRIENTS TIME IN STOMACH Carbohydrates: 1-2 hours Protein: 3-5 hours Fats: 5-7 hours