14 APPLIED PHYSIOLOGY 



SUMMARY 



1. The body is made of separate living cells, each like a 



little animal. 



2. Each cell obeys the mind and works for the benefit of 



the body. 



3. Cells are made of five things ; viz., water, albumin, fat, 



starch, or sugar, and mineral substances. 



4. These five substances are formed outside the body, and 



are food for man. 



5. Oxygen is also taken inside the body, and burns up or 



oxidizes the food and some of the substances of the 

 cells. 



6. By the oxidation within the body heat is produced. 



7. The cells of the body form an engine which changes 



some of the heat to work. 



8. What we eat either is added to the cells of the body, or 



else is oxidized to produce heat and work. 



9. Food is anything which, when swallowed, gives weight 



or heat to the body. 



