The Human Digestive system

  • Created by: charley
  • Created on: 13-08-18 11:22
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  • The Buccal Cavity
    • Oesophegus
      • Stomach
        • Duodenum
          • Illeum
            • Where absorption occurs
            • Large Intestine
              • Colon
                • Water Absorbtion
                • Mineral Absortion
              • Caecum
              • Appendix
              • Rectum
              • Mutualistic  Microorganisms
                • Vitamin K
                • Folic Acid
          • Liver
            • Bile Salts
              • Amphipathic
              • Emulsify lipids
                • Lowers surface tension
                • Increases surface area
            • Bile Pigments
          • Pancreas
            • Pancreatic Juice
              • Secreted by islet cells
              • Enzymes
                • Endopeptidases
                  • Hydrolyse protein to peptides
                • Trypsinogen
                  • Inactive protease
                • Enterokinase
                  • Converts trypsinogen to trypsin
                • Amylase
                • Lipase
              • Sodium Hydrogen Carbonate
                • Raises the pH
        • Has two sphincters, cardiac and pyloric
        • Gastric juice, secreted from gastric pits, contains peptidases, HCl and mucus
          • HCl is secreted by oxyntic cells
          • Mucus is secreted by goblet cells
          • Pepsinogen is secreted by zymogen/chief cells
      • Carries food to the stomach
    • Mechanical Digestion
    • Saliva contains amalase, ions and mucus
      • Ions make the pH slightly alkaline
      • Mucus acts as a lubricant

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