IN HUMAN PHYSIOLOGY. *7 X 



22. Why are starving people exceedingly sensitive to any 

 jar? 



The marrow of the bones is absorbed, and hence the 

 shock of ajar is unbroken. The nervous system is also 

 weakened by the general prostration. 



23. Why will friction, an application of horse-radish 

 leaves, or a blister relieve internal congestion 1 



They bring the blood to the surface of the body, and 

 so relieve the internal organ. 



24. Why are students very liable to cold feet ? 



Because the tendency of the blood is toward the head 

 to supply the waste in that part of the body. 



25. Is the proverb that "blood is thicker than water" 

 literally true ? 



(See Draper's Human Physiology^ page 112.) 



The specific gravity of the blood varies from 1.050 to 

 1.059. 



26. What is the effect upon the circulation of "holding 

 the breath ?" 



The blood is not oxygenated, the products of waste 

 accumulate in the system, the circulation is impeded, the 

 blood-vessels become distended and are liable to burst, 

 while all the delicate organs, especially the brain, are 

 oppressed by congestion. 



27. Which side of the heart is the stronger ? 



The left, which drives the blood to the extremities. 



