THE SKIN AND ITS ADNEXA. 22/ 



in detail. In some parts of the skin its texture is 

 so loose that the corium and epidermis can be 

 readily moved to and fro upon the underlying parts 

 or pinched up in folds ; in others its fibres are short 

 and tense, and bind the corium closely to the parts 

 beneath. In the subcutaneous tissue of most parts 

 of the body, greater or smaller deposits of fat occur, 

 forming the panniculus adiposus ; but in the subcu- 

 taneous tissue of the scrotum, penis, eyelids, and the 

 pinna of the ear, fat is not formed. 



Blood-vessels. The arteries of the skin, which en- 

 ter through the subcutaneous tissue, give off, in 

 general, three sets of branches, through which the 

 blood is distributed to three principal sets of capil- 

 laries : First, to those which supply the fat-tissue ; 

 second, to those which ramify in the sweat-glands ; 

 third, to those which supply the hair-follicles, se- 

 baceous glands, and the papillae of the corium. 

 Each papilla is furnished with a capillary loop, ex- 

 cept when it contains a tactile corpuscle, when the 

 former may be absent. 



THE NAIL. 



We recognize in the hard substance of the nail, 

 which corresponds to the horny layer of the epider- 

 mis, a body and a root ; the former lies upon a por- 

 tion of the somewhat modified corium, called the 

 nail-bed, while the root is imbedded in a shallow 

 pocket of skin, the corium of which constitutes the 



