200 NORMAL HISTOLOGY. 



thin scales, each of which overlaps that above it. This very thin 



FIG. 177. 



7.. 



I 



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 ; e f , 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 ; I, cortical cells of the hair ; m, 

 medulla. 



layer is called the " cuticle " of the hair. Beneath the cuticle the 

 cells are crowded together into fusiform or fibrous elements, which 



