COMPOSITION OF ANIMALS 43 



in the body and of muscular energy ; yet protein may 

 also be used. 



Protein Food furnishes in the animal body : 



1. Protein 



Blood, 



Brain and nerves, 

 Internal organs and skin, 

 Flesh, etc. 



2. Heat 



3. Fat 



4. Energy 



Fat of Food furnishes in the animal body: 



1. Heat 



2. Fat 



3. Energy 



Carbohydrates of Food furnish in the animal body : 



1. Heat 



2. Fat 



3. Energy 



