n6 



GENERAL SCIENCE 



hydrates by the body. Not very much food can be stored 

 in the liver or in the muscle in the form of carbohydrates, 

 and so a continuous supply of food must be going from 

 the digestive organs to the liver and the other parts of 

 the body. In order to keep up this supply, food must 



be eaten every few hours, 

 especially during the time when 

 we are awake and are working 

 hard. 



Foods which contain carbo- 

 hydrates are those made of 

 corn, wheat, oats, barley, etc. 

 Apples, oranges, grapes, plums, 

 peaches, and pears have carbo- 

 hydrates, mostly in the form of 

 sugar. Bananas when thorough- 

 ly ripe have both starch and 

 sugar, and should not be eaten except when they are 

 ripe. Bananas which have a green appearance are nearly 

 all starch, and the starch is in such a condition that 

 it is very hard to digest. Bananas in that state of ripe- 

 ness should never be eaten. The starch in green bananas 

 is about the same as the starch in raw potatoes and has 

 nearly the same taste; both are very hard to digest. 

 When the banana ripens the starch is changed to sugar, 

 and when the potato is cooked the starch is acted upon 

 by the heat and made easy to digest. 



(b) Fats. Fats are substances such as butter, lard, 

 and tallow from animals, and olive oil, cotton seed oil, 

 and linseed oil taken from plants. All the cereals like 

 those which are made from corn, wheat, and oats have 

 fat in them. Fat, being unlike sugar in composition, 

 will not dissolve in water. Fats can be made to mix 



LIVER CELLS 

 Where the glycogen is stored. 



