442 



THE HUMAN BODY. 



In dark races the color of the skin depends mainly on 

 minute pigment granules lying in the cells of the deeper part 

 of the Malpighian layer. 



No blood or lymphatic vessels enter the epidermis, which 

 is entirely nourished by matters derived from the subjacent 



x a 



FIG. 135. A section through the epidermis, somewhat diagrammatic, highly 

 magnified. Below is seen a papilla of the dermis, with its artery, /, and veins, gg ; 

 a, the horny layer of the epidermis ; b, the rete mucosum or Malpighian layer; d, 

 the layer of columnar epidermic cells in immediate contact with the dermis ; h, the 

 duct of a sweat-gland. 



corium. Fine nerve-fibres run into it and end there among 

 the cells. 



The Corium, Cutis Vera, or True Skin, Fig. 136, consists 

 fundamentally of a close feltwork of elastic and white fibrous 

 tissue, which, becoming wider meshed below, passes gradually 

 into the subcutaneous areolar tissue (Chap. VIII) which 

 attaches the skin loosely to parts beneath. In tanning it is the 



