4O2 APPLIED PHYSIOLOGY 



When a cold is first coming on, a hot bath and hot drinks and hot 

 bed clothing, together with a liver stimulant, may cause the skin and 

 liver to excrete enough toxins to enable the white blood cells to over- 

 come the bacteria. 



706. A long life. Although in former times man was 

 often* conquered by bacteria of disease and even now is 

 continually assailed, yet now he knows more about his tiny 

 foes and is able to protect himself. He knows that his 

 eating, his breathing, his work, his rest, and in fact his 

 every action will render his cells either more or less able 

 to combat with disease germs. If all men would live up 

 to their knowledge, germs of disease would find no lodg- 

 ment in the body, while there would be no cause of dis- 

 ease in the body itself. Then man's mind would remain 

 with his body far beyond the allotted three score and ten 

 years, and, during all its long stay, would find the body a 

 willing servant to build the ideal plans of the spirit into 

 enduring realities. 



SUMMARY 



1. An injury to the cells of the body causes the arteries to 



dilate and bring more blood to the part. 



2. Over a sore spot the white blood cells form new con- 



nective tissue while the epithelium of the healthy 

 skin spreads over the new tissue, stopping its growth 

 and completing the healing process. 



3. When bacteria are growing in an injured spot, the white 



blood cells attack them, but are often killed them- 

 selves and pass off as creamy matter called pus. 



4. If the white blood cells cannot overcome the bacteria, 



they hem them in until they and the tissues starve 

 and run out as pus. 



