3<D APPLIED PHYSIOLOGY 



is a chemical action, as is also its becoming a part of the living cells. 

 Breathing and the production of the waste matters of the body are 

 also chemical processes. 



These chemical processes can be followed and even imitated in a 

 laboratory. The living principle in the body directs the work, but 

 uses few processes which are not also used outside of the body. It has 

 been a great triumph for science to liberate men from the superstition 

 that the chemical and physical laws of our bodies were governed by the 

 arbitrary feelings of indwelling spirits, and so were different from the 

 laws governing lifeless creatures. 



SUMMARY 



1. The cells of the body are composed of five substances, 



viz., water, albumin, fat, sugar, and minerals. 



2. Water is three fourths of the body. It carries food to 



the cells and washes away their waste matters. 



3. Albumin is like the white of eggs. It forms the pro- 



toplasm of all cells. It warms the body, and gives 

 it strength and weight. 



4. Fat is in pockets between the cells. It protects and 



heats the body. 



5. Starch and sugar are similar substances. They warm 



the body. 



6. The minerals in the body are salt, lime, soda, and 



potash. They are found in all food. In addition 

 some salt must be eaten. 



7. Salt aids in the preparation and distribution of food to 



the cells of the body. 



8. Lime stiffens the bones. 



9. Soda and potash destroy irritating acids within the 



body. 



10. Water, albumin, sugar or starch, fat and minerals, are 



foods and must be eaten to sustain life. 



11. Most of the vital actions of the body can be imitated 



in a chemical laboratory. 



