486 



THE TISSUES. 



Fig. 324. 



exist on either the prepuce or the glans clitoridis. (Kottiker.) Leh- 

 man's analysis of the smegma has already been given (p. 227). 



The corium is regenerated if entirely removed; but the new de- 

 velopment has neither papillae nor ridges. 



The epithelium, therefore, though 

 regenerated in all cases when removed, 

 has none of the usual elevations and 

 depressions on both its surfaces, if the 

 coriurn also has been removed. If 

 the latter has remained uninjured, the 

 new epithelium is rapidly produced 

 and perfect, though it grows up as 

 a whole from the corium below. This 

 is well shown by the application of a 

 blister. 



APPENDAGES AND ACCESSOEY OR- 

 GANS OF THE SKIN. 

 The appendages of the skin are the 

 nails and the hair, already described 

 (pp. 249 68). The accessory organs 

 are : 1, the sebaceous glands ; 2, the 

 sweat-glands; and 3, the subcutaneous 

 bursce mucosce. 



1. The Subcutaneous Bursce Mucosce 

 are merely simple or partially subdi- 

 vided reticular spaces in the subcuta- 

 neous areolar tissue ; as over the up- 

 per extremity of the olecranon, over 

 the patella, &c. Their internal walls 

 are smooth but uneven, and are form- 

 ed of areolar tissue. They contain 

 a viscid clear fluid, but have no epi- 

 thelium. 



2. The Sebaceous Glands. These 

 glands vary in form from the simple 

 follicle (Fig. 324, A) to the racemose 

 gland (Fig. 324, B). They occur prin- 

 cipally upon the hairy parts of the 

 body, opening in common with the 



Sebaceous glands from the nose. A. 

 Simple follicular gland without any hair. 

 B. Racemose gland, having a common 

 opening with a hair-sac ; a, glandular epi- 

 thelium, 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-sac (root-sheath), with the 

 hair, /.Magnified 50 diameters. (Effli- 

 Icer.) 



