GASTRIOINTESTINAL TRACT FUNCTIONS DIGESTION: transformation of food, absorbable nutrients and compounds mechanical and chemical ABSORPTION: Selective.

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Presentation transcript:

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

PRIMARY ORGANS Mouth Esophagus Stomach Small Intestine Large Intestine

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

PRIMARY ORGANS Mouth: Digestion: Starch enzymeMaltose

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

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

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