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Alimentary system
 

Alimentary system

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    Alimentary system Alimentary system Presentation Transcript

    • Alimentary System
      Prepared by:
      Chelsea F. Veridiano
    • Alimentary System
      The 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.
    • Alimentary System
      Stomach
      Duodenum
      Liver
      Pancreas
    • Stomach
      SECRETED HORMONES:
      • Gastrin
      • Neuropeptide Y
      • Ghrelin
      • Histamine
      • Somatostatin
      • Endothelin
    • Stomach
      GASTRIN
      • From G cells
      • Secretion of Gastric acid by Parietal Cells
      NEUROPEPTIDE Y
      • Increased food intake
      • Decreased physical activity
    • Stomach
      GHRELIN
      • From P/D1 cells
      • Stimulate appetite
      • Secretion of growth hormone from anterior pituitary gland
      HISTAMINE
      • From ECL cells
      • Stimulate Gastric Acid secretion
    • Stomach
      SOMATOSTATIN
      • From D cells
      • Suppress release of gastrin, CCK, secretin, motilin, VIP, GIP, enteroglucagon
      • Lowers rate of gastric emptying
      • Reduces smooth muscle contractions and blood flow within the intestine.
      ENDOTHELIN
      • From X cells
      • Smooth muscle contraction of stomach
    • Duodenum
      SECRETED HORMONES:
      • Secretin
      • Cholecystokinin
    • Duodenum
      SECRETIN
      • From S cells
      • Secretion of bicarbonate from liver, pancreas and duodenal Brunner’s gland
      • Enhances effects of CCK
      • Stops production of gastric juice
    • Duodenum
      CHOLECYSTOKININ (CCK)
      • From I cells
      • Release of digestive enzyme from pancreas
      • Release bile from gallbladder
      • Hunger suppressant
    • Liver
      SECRETED HORMONES:
      • Insulin like growth factors
      • Thrombopoietin
      • Angiotensinogen and Angiotensin
    • Liver
      INSULIN LIKE GROWTH FACTOR (IGF)
      • From Hepatocytes
      • Insulin like effects
      • Regulate cell growth and development
      THROMBOPOIETIN
      • From Hepatocytes
      • Stimulates megakaryocytes to produce platelets
    • Liver
      ANGIOTENSINOGEN and ANGIOTENSIN
      • From Hepatocytes
      • Vasoconstriction
      • Release of aldosterone from adrenal cortex dipsogen
    • Pancreas
      SECRETED HORMONES:
      • Glucagon
      • Pancreatic polypeptide
      • Somatostatin
      • Insulin
    • Pancreas
      GLUCAGON
      • From α islet cells
      • Glycogenolysis and gluconeogenes in liver
      • Increases blood glucose level
      PANCREATIC POLYPEPTIDE
      • From PP cells
      • Self regulate the pancreas secretion activities and effect the hepatic glycogen levels.
    • Pancreas
      SOMATOSTATIN
      • From δ islet cells
      • Inhibit release of insulin
      • Inhibit release of glucagon
      • Suppress the exocrine secretory action of pancreas
    • Pancreas
      INSULIN
      • From β islet cells
      • Intake of glucose, glycogenesis and glycolysis in liver and muscle from blood intake of lipids and synthesis or triglycerides in adipocytes