The Vertebrate (mostly human) Digestive System Mouth ...

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StomachSack-like, thick walled, muscular,with highly convoluted interior mucosasmooth muscle churns foodGlands in mucosaproduce secreteseveral compounds
Parietal cells secrete HCl and intrinsic factor (for B 12 absorption)Chief cells secrete pepsinogen, an inactive proteaseActive proteases in stomach activate pepsinogen to pepsinDigestion in stomach restricted to protein digestionproteins reduced to smaller polypeptidesHCl aids protein digestion by denaturing proteinsStomach produces 2 lgastric secretions/dayStomach pH = 2No digestion ofcarbohydrates or fats<strong>The</strong> acidic food mixtureproduced in the stomachis called “chyme”
Page 1 and 2: The Vertebrate (mostly human) Diges
Page 3 and 4: The MouthThe teeth cut and grind fo
Page 5: EsophagusUpper 1/3 of esophagusenve
Page 9 and 10: Small Intestineabout 6 m longcompos
Page 11 and 12: Accessory OrgansPancreasPancreas -
Page 13 and 14: Fats hydrolyzed into fattyacids and
Page 15 and 16: Large Intestine (colon)Has no diges
Page 17 and 18: The rectum - terminal portion of th
Page 19 and 20: Pancreas is also an endocrine gland
Page 21 and 22: Regulatory Functions of the LiverHe
Page 23: Passage of chyme from stomach inhib

The Vertebrate (mostly human) Digestive System Mouth ...

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