Topography. 



Orifcwtan. 



Vertc. 

 seminal. 



Orif.ureter. 



Corrp. cavern, 

 urethr. 



404. Sagittal Median Section through the Male 



Pelvis, the Penis being erect. (Construed out of Fig. 400-) 



The male urethra, 6 7 inches long, extends from the neck of the 

 bladder (Orificium vesicate), to the Meatus urinarius (Orificium cutaneum) ; in the 

 erect state of the penis it forms only a single curve, but in the flaccid state a 

 double curve. It is divided into the prostatic portion, Pars prostatica, membranous 

 portion, Pars membranacea (Isthmus) and the spongy portion, Pars cavernosa. 

 Along the floor of the prostatic portion is a narrow, longitudinal ridge, the Caput 

 gaUinaginis s. Colliculus seminalis, formed by an elevation of the mucous mem- 

 brane; at the fore part of the Caput gaUinaginis is the Vesicula prostatica (Sinus 

 pocularis], and upon or within its margins are the slit-like openings of the 

 ejaculatory ducts; on each side of the caput are the orifices of the prostatic ducts. 



The membranous portion is the narrowest part of the urethra, surrounded 

 neither by the prostate nor by the Corpus cavernosum. 



The spongy portion is surrounded by the Corpus spongiosum (Corpus caver- 

 nosum urethr ae), which is situated in the groove on the under surface of the 

 Corpora cavernosa penis; at its commencement, the Corpus spongiosum forms a 

 rounded enlargement, the bulb, Bulbus urethrae, therefore the part of the urethra 

 contained within the bulb, which is somewhat dilated, is called 



Bulbous portion, Pars bulbosa; here the excretory ducts of Cowper's glands 

 open. The lining membrane of the urethra is beset with small glands and follicles, 

 and larger recesses or Lacunae Morgagni, especially abundant in the bulbous 

 portion. At the glans penis the urethra is again dilated, forming the Fossa 

 navicularis. 



H e i t z vn a n n , Atlas. II. 



'.I 



