THE REPROnrc^TTVE SYSTKM 



357 



r 



cles and Krause's end-bulbs in the more supcrlicial connective tissue, 

 and {d} Meissner's corpuscles in the papillae. (For details see pages 

 438 and 439.) 



The ghms penis consists of erectile tissue similar in structure to 

 that of the corpus cavernosum, except that the venous spaces are 

 smaller and more regular. The mucous membrane is very closely 

 attached to the fibrous sheath of the 

 underlying erectile tissue. A few 

 small sebaceous glands, unconnected 

 with hairs — the glands of Tyson — 

 are found in the mucous membrane 

 of the base of the glans penis. 



The prepuce is a fold of skin 

 which overlies the glans penis. Its 

 inner surface is lined with mucous 

 membrane. 



.1 





I 





B 





• >'-,:'^^ 



f 



e::: 



■^^..rn 



y 



- d 



-■.^■riSi 



Fig. 249. Fig. 250. 



Fig. 249. — From Transverse Section of Urethra and Corpus Spongiosum, including 

 Mucous Membrane and part of Submucosa. X15. The dark spots represent the 

 cavernous veins. 



Fig. 250. — Vertical Section through Portion of Wall of Human Male Urethra. 

 X3S0. A, Mucous membrane; B, submucosa; a, epithelium; b, stroma; c, cavernous 

 veins; d, connective tissue of submucosa. 



The Urethra^ 



The MALE URETHRA is divided into three parts — prostatic, mem- 

 branous, and penile. The wall of the urethra consists of three coats — 



^ The female urethra, while not so distinctly divisible into sections, presents essen- 

 tially the same structure as the male urethra. The epithehum begins at the bladder 

 as stratified squamous of the transitional type, changes to a two-layered stratified or 

 pseudostratified, and finally passes over into stratified squamous near the urethral 

 opening. Glands of Li re pre?, t, but are fewer than in the male. 



