208 NORMAL HISTOLOGY. 



upon the surface of the papilla, where it forms the root of the hair, 



Fig. 185. 



Pi 







6 



- c 



e. 







Hair-follicle from the human scalp. (Mertsching.) Longitudinal axial section through the 

 fundus: a, b, longitudinal and encircling layers of the fibrous coat; c, hyaline layer, 

 formed of an outer faintly fibrillated and an inner more homogeneous lamina; d, 

 papilla; e, outer root-sheath, continuous with rete mucosum of epidermis ; c', its outer 

 layer, continuous with deepest cells of rete and with columnar cells covering the papilla; 

 e", its inner layer, continuous with the cortical cells of hair ; /, Henle's sheath ; g, Hux- 

 ley's layer; h, cuticle of root-sheath ; k, cuticle of hair; /, cortical cells of the hair; m, 

 medulla. 



and then passes into the shaft, which is made up of cells, derived 

 from those of the root, that have suffered keratoid degeneration. 

 The epithelium lining the follicle, as well as that which composes 



