OF THE PILOUS SYSTEM. 



Q. What is the organization of the hairs? 



*#. An external epidermis, and an internal vascular 

 tissue, which is the pilous texture. 



Q. What reason have you for supposing the internal 

 texture vascular? 



A. Because, in disease, as the plica polonica, the hair 

 bleeds. 



Q. To what texture is the pilous analogous ? 



t#. To the reticular of the skin, which has a colouring 

 and a vascular tissue. 



Q. What phenomena depend for explanation on the vas- 

 cular character of the internal texture of the hair? 



#. The change of colour of the hair suddenly, from 

 fright, grief, &c.; the bleeding of the plica polonica; the 

 pain of the head from cutting, or from too much hair. 



Q. What is the origin of the hair? 

 /?. It arises from the sub-cutaneous fat or the cellular 

 texture. Each hair is contained in a small, membranous 

 canal. 



Q. Have the hairs vital properties? 

 *fl. They are destitute of animal sensibility, but organic 

 forces are seen in the diseases of the hair. They are said 

 to have nerves. 



