THE CELLULAR CHANGES OF AGE 59 



of hairs, of which I will show you two pictures. The 



FIG. 17. SECTION OF THE HUMAN SKIN, MADE so THAT THE 

 HAIRS ARE CUT LENGTHWISE. Ap, erector muscle of the hair ; 

 <?/, epidermis ; c, deep skin or dermis ; fp, hair follicle ; Rp t root of 

 hair ; Re, subdermal tissue ; gls, sweat glands. ; Gap, fibrous layer 

 (aponeurosis). X 15 diameters. After Sobotta. 



first represents a section through the human skin 

 taken in such a way that the hairs are themselves cut 



