DIGESTION 3*27 



3. What changes, physical and chemical, take 

 place in the food while it is in the mouth? 



4. What is the digestive fluid in the stomach? 

 What chemical change does it produce in the food'? 



5. Name the three digestive fluids in the small 

 intestine. 



6. State definitely the action of each upon the 

 food. 



7. In what part of the alimentary canal does most 

 food diffuse into the blood? 



8. What is the structure of a villus? 



9. Trace the path taken by fats from the intestine 

 to the heart. 



10. Trace sugars and proteins from the intestine 

 to the heart. 



11. Which foodstuff is stored in the liver? 



12. How long does it take, from the time food is 

 eaten, until it becomes a part of the body? 



13. What is the function of the large intestine ? 



