1. The Human Digestive System

3. Incisors: Soft palate: Tongue: Uvula:

4. Incisor: Canine: Premolar: Molar:

5. Salivary glands produce saliva, a mix of: -

6. Enamel: Dentin: Pulp: Cement: Nerve Blood vessel Crown Root

8. Different skulls Tiger Carnivore Raccoon Omnivore

10. Different skulls Horse Herbivore Omnivore

12. Different skulls Sheep Herbivore Bear Carnivore

15. Experiment on digestion Use saliva to break down (boiled) starch The substance that digests is called: an enzyme Test the best temperature for the enzyme to work in

16. Starch test Starch + Iodine solution > blue-black Starch + Iodine + saliva > Shake holding the test tube in your hand > Record the time > > solution turns colourless (starch has been digested)

17. Test tube (1) boiled starch + Iodine + saliva at body temperature Test tube (2) boiled starch + Iodine, kept at 60 degrees C for 10 minutes + saliva Test tube (3) boiled starch + Iodine, kept at 4 degrees C for ten minutes + saliva

18. Tooth decay

19. Formation of plaque Acid attacks on enamel Enamel dissolves Small cavity in the enamel Crack in enamel exposes pulp Pulp gets infected (pain!) Pulp tissue dies, tooth is lost

21. Tooth decay Apply tooth paste Brush (circular movements0 Floss Brush Rinse Brush Rinse