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Understanding the Digestive System: Components, Functions, and Peristalsis

Explore the intricate workings of the human and rat digestive systems, encompassing the alimentary canal, digestive glands, peristalsis, and the structure of villi. Learn about the movement and absorption of food through peristalsis and villi, crucial for proper digestion and nutrient uptake.

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Understanding the Digestive System: Components, Functions, and Peristalsis

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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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