DERMOID SYSTEM. 303 



/?. Because of the great difference, in various persons, 

 in predisposition to disease. In one, a cutaneous sympa- 

 thy excites the predominant forces of a serous, and in 

 another of a mucous tissue. 



Q. Why is it that the sympathies of animal contracti- 

 lity, and of sensible organic contractility in the skin are 

 not active? 



d. Because the dermoid texture has not these proper- 

 ties. 



Q. What are the important characters of dermoid life 

 and vital forces? 



#. Animal sensibility is more acute in some parts than 

 others; it is more acute in the palms of the hands and 

 soles of the feet, and in the hypochondriac regions. Or- 

 ganic sensibility varies in force in different parts. 



Q. There is an important difference between the ani- 

 mal and organic forces of the dermoid texture, what is it? 



/?. The animal vital forces of the skin are intermit- 

 tent in action, the organic forces are continually opera- 

 tive. During sleep, these organic forces are said to be 

 increased in activity; 



Q. What arises from this increased activity of the or- 

 ganic vital forces of the skin during sleep? 



Ji. Hence it is that those diseases have their exacerba- 

 tions at night, which affect mostly the organic forces; 

 whereas those that affect the animal vital forces of the 

 skin, are not thus exacerbated at night. 



Q. What effect has sex on the cutaneous vital forces? 



*#. The animal vital forces of the skin are more acute 

 in. the female than in the male sex. 



