39 



Epidermis. 



HISTOLOGY 



Cells of the hair canal. 



^mm^^^^i 



'^Mf?^ 



Arrector 

 'muscle. 



FIG. 394- VERTICAL SECTION OF THE 

 SKIN OF THE GLUTjBAL REGION 

 o F A HUMAN EMBRYO o F FIVE 

 MONTHS. X 230. 



PIG. 39S- VERTICAL SECTION OF THE 

 SKIN OF THE BACK OF A HUMAN 

 EMBRYO OF FIVE AND A HALF 

 MONTHS. X 230. 



Tip of the 



inner 

 sheath. 



Sebaceous -7^^ 



gland. /-^ 



Outer 

 sheath. 



Root of /_ 



the hair. 



Epithelial 

 bed. 



Hyaline membrane. 

 Papilla. 



Tangential section of the outer sheath. 



\ 

 X 

 Cornified inner sheath. 



; - 



>,/,< ' 



V >*-*' 



V x * %*.%' ^ 



Cell nuclei of the sheath cuticle. ^ 



Inner J ._ ^uxley's layer [^ _&>> A&?\ $^ 



>'/.'*$$& r~ 



'.I*-* 



Epithelial bed. 



MiMMft\ 



iff* ^^ Hai 



'*" 



FIG. 396. VERTICAL SECTION OF THE SKIN OF THE FOREHE.AD OF A HUMAN 

 EMBRYO OF FIVE MONTHS. X 230. Differentiation of the sheaths of the hair. 



Hair 



