The Small Intestine

1. The Small Intestine

2. The start of the small intestine Liver 2 3 Gall bladder Stomach 1 4 Pancreas Small intestine 5

3. Milk and Food Colouring Demo

4. BileBile works like washing up liquid…it splits big fat globules up into small fat globules.

5. The Liver and the Gall Bladder The liver produces bile The gall bladder stores bile Bile splits big blobs of fat into smaller blobs which are easier for enzymes to digest

6. The Pancreas The pancreas produces and releases the enzyme lipase Lipase breaks down fats into fatty acids and glycerol Lipase FatFatty acids + glycerol

7. Now large insoluble food molecules have been broken down into small soluble molecules Protein Carbohydrate e.g. starch Fat Amylase Lipase Pepsin

9. Now large insoluble food molecules have been broken down into small soluble molecules Protein Carbohydrate e.g. starch Fat Amylase Lipase Pepsin

13. The Small Intestine All the nutrients from digestion are absorbed by the small intestine The surface of the small intestine is covered in villi The Villi Villi increase the surface area of the small intestine. This means that more nutrients can be absorbed and faster.

14. Features of the villi Thin epithelium The skin of each villus is only one cell thick, this allows absorption to happen very fast. Good Blood Supply The blood capillaries absorb simple sugars and amino acids Lacteal The lacteal absorbs fatty acids and glycerol

15. The Large Intestine

16. Large intestine Large Intestine Appendix Appendix Rectum Rectum All that enters the large intestine is waste material and water.

17. The Large Intestine • The large intestine absorbs excess water from the waste material The Rectum • The rectum stores faeces until it is convenient to expel it