FOOD 115 



(a) Carbohydrates. Carbohydrates are so called be- 

 cause they contain hydrogen and oxygen in the same 

 ratio as water, that is 2 to i. Carbohydrates are com- 

 posed of carbon, hydrogen, and oxygen. The pure forms 

 of carbohydrates are sugar and starch. The chemical 

 composition of starch is CeHioOs, and that of grape sugar 

 is C 6 Hi 2 O 6 . From these compounds you can see that 



SUGAR FACTORY 



the hydrogen and oxygen are in the same ratio as in water, 

 that is, 2 to i. The carbohydrates are digested in the 

 mouth, in the stomach, and in the intestines, and are then 

 carried by the blood to the liver, where they are stored, 

 and given out and carried to all parts of the body as 

 they are needed. A part of the carbohydrates is oxidized 

 in the liver to make heat and the rest is oxidized in the 

 blood and in the muscle. The part oxidized in the 

 muscle produces energy which enables the body to move. 

 Carbohydrates are also sometimes stored in the body 

 in the form of fat; that is, fat is made out of the carbo- 



