CH. VIl] 



THE FUNCTIONS OF THE SKIN 



85 



and frequently containing air spaces, and a cortex which sur- 

 rounds the medullary portion, and generall}^ contains pigment 

 giving the hair its peculiar colour. With the advance of age 

 this pigment is often removed by the action of phagocytes. 

 Outside of the cortex is a thin cuticle formed of flat horny plate- 

 like structures. 



stratum 



corneum 



rete mucosum 



cutis vesa 



' i 



sweat {'lands 



adipose tissue 



I'-i- 42. V.u;.;,l ~.,. 



>i foot (from Schafer). 



