Food Values 367 



SUMMARY 



There is necessity for a constant supply of new substances to 

 furnish building material and energy for the body. 



Food may be defined as a substance containing material neces- 

 sary for the growth of the cells of the body or for the production 

 of energy. 



There are six food substances or nutrients proteins, carbo- 

 hydrates, fats, water, mineral matter, and vitamins. 



Food should be so prepared as to make use of the vitamins. 



The importance of a supply of pure water cannot be overesti- 

 mated. It is indispensable to life. 



Milk is more nearly a complete food than any other substance. 

 It is necessary to take great care to keep milk free from im- 

 purities. 



The fuel value of a food is measured by the amount of heat 

 energy it furnishes. This heat energy is measured in Calories (C). 



The Calorie is the amount of heat required to raise one pound 

 of water four degrees Fahrenheit. 



The daily food requirement of an individual may be measured 

 in Calories if his age, weight, and daily work are known. 



The body needs a well-selected mixed diet. 



A standard of measurement is necessary in order to insure 

 a well-selected diet. The amount of food required to yield one 

 hundred Calories is a convenient unit of measurement. 



FACT AND THOUGHT QUESTIONS 



1. Name the six classes of nutrients and state the use of each to the body. 



2. Name several plant and animal food products raised in your neighbor- 

 hood. What nutrients does each supply? 



3. Why do you eat more after playing or working hard? 



4. How does climate affect the kinds of food you eat? 



5. Discuss the importance of water to the body. 



6. Why is milk considered a perfect food for children? 



7. Mention a test for each of the nutrients. 



8. In what foods are vitamins found? 



9. Discuss the necessity of a well-selected mixed diet. 



10. Define Calorie. 



11. Give the number of Calories required per hour by a man at light 

 muscular exercise; at moderately active muscular exercise. 



