500 



PHYSIOLOGY 



CIIA1'. 







Fia. 138. (Left.) Hair follicle, longitudinal section. (Biesiadecki.) ft, mouth of follicle ; I, neck 

 of follicle; c, lower bulbar swelling; d, e, dermic coat (outer and middle layer; the inner or 

 hyaline layer is not seen);/, (/, epidermic coat (inner and outer root-sheath); h, cuticle of 

 root-sheath; k, medulla; I, hair-bulb; m, fat of subcutaneous tissue; it, arrcctor pili ; 

 ", papilla of skin; j>, papilla of hair-bulb; at, Malpighian layer of epidermis; eji, stinlnni 

 corneum, erroneously represented in figure as continuation of inner root-sheath ; t, sebaceous 

 gland. 



Fie. 13!. (Right.) Longitudinal section of a sebaceous gland from the cheek, with a small hair 

 growing through its duct. Unman. (Toldt.) 



