1. The Human Digestive System

3. Incisors:
Tongue:
Uvula:

4. Incisor:……………..
Canine:…………….
Premolar:………….
Molar:………………

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

6. Enamel:……………..
Dentin:………………
Pulp:…………………
Cement:…………….

9. Swallowing ………………. closes the nasal cavity
………………. closes the wind pipe
………………. pushes food into the gullet

10. Different skulls
Tiger
………………………
Raccoon
………………………

12. Different skulls
Horse
………………………
Human
…………………….

13. Different skulls
Sheep
……………………..
Bear
………………………

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

15. 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)

16. 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

17. Tooth decay

18. Tooth decay Formation of plaque (bacteria) Acid attacks on ………………
Enamel dissolves
Small ………….. in the enamel
Crack in enamel exposes ……………..
Pulp gets …………….. (pain!)
Pulp tissue ………., tooth is …………….