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The digestive system

The digestive system. Components of the digestive system The alimentary canal Digestive glands Human digestive system The digestive system of a rat Peristalsis The structure and functions of a villus. The digestive system in mammals. Alimentary canal. Digestive glands. +.

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The digestive system

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  1. The digestive system

  2. Components of the digestive system • The alimentary canal • Digestive glands • Human digestive system • The digestive system of a rat • Peristalsis • The structure and functions of a villus

  3. The digestive system in mammals Alimentarycanal Digestive glands + a tube from mouth to anus they produce enzymes for digestion

  4. oesophagus stomach large intestine small intestine rectum anus The alimentary canal

  5. Digestive glands • salivary glands • gastric gland • liver • pancreas • intestinal gland saliva gastric juice bile pancreatic juice intestinal juice

  6. Human digestive system

  7. Digestive system of a rat stomach liver small intestine large intestine

  8. Peristalsis The rhythmiccontractionandrelaxationof themusclesof the gut wall to move food along the alimentary canal • muscle behind the food boluscontracts • muscle in front of the food bolusrelaxes food bolus is pushed along the gut

  9. Structure and function of a villus lacteal villus transports fatsand glucose increase surface area for absorption one cellthick withblood capillaries and alacteal muscle wall

  10. Summary • The digestive system • is the system of organs that are involved in the process of digestion • is made up of the alimentary canal and associated glands • Movement of food along the alimentary canal • by peristalsis • Absorption of digested food • by villi

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