DIGESTION, CIRCULATION, AND ABSORPTION 275 



Conclusions. 1. Does bile digest proteid ? Starch ? 



2. Does bile aid pancreatic juice ? 



3. Does bile prevent putrefaction ? 



Questions 



1. What is a food ? What is a perfect food ? 



2. Explain fully the digestion of a piece of bread and 

 butter. 



3. Soup is absorbed quickly. Why is it good to eat at 

 the beginning of a meal ? 



4. Why is the chewing of tobacco and gum generally 

 harmful ? 



5. In which of the digestive organs is but one kind of 

 digestive juice furnished ? 



6. In what digestive organ are three juices poured ? 



7. What nutrient digested in only one organ ? 



8. What nutrients digested in two organs ? 



9. Why should starchy foods remain longer in the mouth 

 than meat or proteid ? 



10. Why is half-cooked or soggy bread harder to digest than 

 raw wheat ? Which one needs the most saliva ? Why ? 



11. For what purpose does the body use lean meat ? 



12. Name three foods easily digested. Three foods hard 

 to digest. 



13. The uses of starch or sugars in the body ? Of fats ? 



14. Explain the biology of the following : 



" Now good digestion wait on appetite, 

 And health on both." SHAKESPEARE. 



Special Reports 



1. Common causes of illness. 



2. Effect of lack of exercise on digestion. 



3. Health fads and foods. 



4. The harm done by ignorant cooks. 



5. Effect of alcohol on digestion. 



6. Causes and prevention of dyspepsia. 



