The document discusses the alimentary system and its major organs - the stomach, duodenum, liver, and pancreas. It provides details on the hormones secreted by each organ and their functions in digestion. The stomach secretes hormones like gastrin, ghrelin, and histamine that stimulate gastric acid secretion and appetite. The duodenum secretes secretin and CCK which stimulate enzyme release from the pancreas and bile from the gallbladder. The liver secretes IGF and thrombopoietin to regulate growth and platelet production. The pancreas secretes glucagon, insulin, somatostatin and other hormones to regulate blood sugar levels and digestive enzyme secretion.

1. Alimentary SystemPrepared by: Chelsea F. Veridiano

2. Alimentary SystemThe organ system devoted to the ingestion, digestion, and assimilation of food and the discharge of residual wastes and consisting of the alimentary canal and those glands (ENDOCRINE GLANDS) that secrete digestive enzymes and HORMONES.

3. Alimentary SystemStomachDuodenumLiverPancreas

5. StomachSECRETED HORMONES:Gastrin

6. Neuropeptide Y

7. Ghrelin

8. Histamine

9. Somatostatin

10. EndothelinStomachGASTRINFrom G cells

11. Secretion of Gastric acid by Parietal CellsNEUROPEPTIDE YIncreased food intake

12. Decreased physical activity

13. StomachGHRELINFrom P/D1 cells

14. Stimulate appetite

15. Secretion of growth hormone from anterior pituitary glandHISTAMINEFrom ECL cells

16. Stimulate Gastric Acid secretion

17. StomachSOMATOSTATINFrom D cells

18. Suppress release of gastrin, CCK, secretin, motilin, VIP, GIP, enteroglucagon

19. Lowers rate of gastric emptying

20. Reduces smooth muscle contractions and blood flow within the intestine.ENDOTHELINFrom X cells

21. Smooth muscle contraction of stomach

22. DuodenumSECRETED HORMONES:Secretin

23. CholecystokininDuodenumSECRETINFrom S cells

24. Secretion of bicarbonate from liver, pancreas and duodenal Brunner’s gland

25. Enhances effects of CCK

26. Stops production of gastric juice

27. DuodenumCHOLECYSTOKININ (CCK)From I cells

28. Release of digestive enzyme from pancreas