Chap. XXXIV.j 



THE SKIN. 



279 



almost everywhere contains cylindricaiyb^Wes, planted 

 more or less near to one another, and in groups. In 

 each of them is fixed the root of a hair ; that part 



Fig. 147. Longitudinal Section through a Human Hair. 



1, Epidermis; 2, mouth of hair follicle 1 ; 3, sebaceous follicle; 4, musculua 

 arrector plu ; 5, papilla of hair ; 6, adipose tissue. (Atlas.) 



of the hair which projects beyond the general surface 

 of the skin is the shaft. 



A very few places contain no hair-follicles, such, 

 for instance, as the volar side of the hand and foot, 

 and the skin of the penis. 



In size, the hairs and hair-follicles differ in diffe- 

 rent parts. Those of the scalp, the cilia of the eyelids, 



