OF THE GLANDS OF THE SKIN. 



213 



75, 76, 77, 83), whilst in the lanugo the ducts and the hair-sacs are 

 often of about the same diameter (Fig. 84 _#), and open into a common 

 canal, which may be regarded as a continuation of the one as much as 

 of the other ; or the ducts may even be the larger (Fig. 85), the hairs 

 bearing a subordinate relation to them, so that their sacs open into the 

 glands, and the hairs come out through the glandular opening itself. In 

 the hairless parts of the surface, sebaceous glands occur only in the 

 labia minora (vide 54), and in the glans penis and prepuce, whilst 

 they do not exist in the glans and prepuce of the clitoris. In general, 

 the glands are situated close to the hair-sacs in the superficial layer of 

 the corium, and are larger in the finer hairs than in the coarser ; in 



Fiff. 84. Fig. 85. 



particular cases, however, they present many 

 differences. With respect to the glands of the 

 larger hair-sacs, they are usually of the simple 

 racemose kind, having an average size of JQ- 

 T 3 ^ of a line, and are disposed around the sac to 

 the number of from 2 to 5. The smallest, of 

 0-1-0*16 of a line, occur in pairs, attached to 



FIG. 84. Sebaceous glands from the nose; magnified 50 diameters. A, simple tubular 

 gland without any hair ; _B, compound gland, which has a common opening, with a hair- 

 sac : a, glandular epithelium, connected with 6, the stratum Malpighii of the epidermis c, 

 contents of the glands, sebaceous cells, and free fat; d, the separate racemes of the compound 

 gland ; e, hair-sacs (root-sheath), with the hair, /. 



FIG. 85. A large gland from the nose, with a little hair-sac opening into it ; magnified 

 50 diameters. The letters a-/ as in Fig. 84. 



