cavernous structure the arteries divide into branches, which are supported and enclosed by the 

 trabeculae. Some of these arteries end in a capillary net-work, the branches of which open directly 

 into the cavernous spaces; others assume a tendril-like appearance, and form convoluted and 

 somewhat dilated vessels, which were named by Mtiller heticine arteries. They open into the 



CAVERNOUS 

 BRANCH 



CLANS PENIS 



INTERNAL PUDIC 

 ARTERY 



Fia. 1158. Diagram of the arteries of the penis. (Testut.) 



spaces, and from them are also given off small capillary branches to supply the trabecular struc- 

 ture. They are bound down in the spaces by fine fibrous processes, and are most abundant 

 in the back part of the corpora cavernosa (Fig. 1157). 



The blood from the cavernous spaces is 

 returned by a series of vessels, some of 

 which emerge in considerable numbers 

 from the base of the glans penis and 

 converge on the dorsum of the organ to 

 form the deep dorsal vein; others pass out 

 on the upper surface of the corpora caver- 

 nosa and join the same vein; some emerge 

 from the under surface of the corpora 

 cavernosa penis and receiving branches 

 from the corpus cavernosum urethrse, wind 

 around the sides of the penis to end in the 

 deep dorsal vein ; but th : greater number 

 pass out at the root of the penis and 

 join the prostatic plexus. 



The lymphatic vessels of the penis are 

 described on page 713. 



The nerves are derived from the puden- 

 dal nerve and the pelvic plexuses. On the 

 glans and bulb some filaments of the 

 cutaneous nerves have Pacinian bodies 

 connected with them, and, according to 

 Krause, many of them end in peculiar end- 

 bulbs (see page 1060). 



SUPERFICIAL DORSAL VEIN 

 EXTERNAL PUDIC VEIN 



OBTURATOR VEIN 



The Prostate (Prostata; Prostate 

 Gland). (Fig. 1160.) 



The prostate is a firm, partly 

 glandular and partly muscular body, 

 which is placed immediately below 

 the internal urethral orifice and 

 around the commencement of the 

 urethra. It is situated in the pelvic cavity, below the lower part of the symphysis 

 pubis, above the superior fascia of the urogenital diaphragm, and in front of 

 the rectum, through which it may be distinctly felt, especially when enlarged. 

 It is about the size of a chestnut and somewhat conical in shape, and presents for 

 examination a base, an apex, an anterior, a posterior, and two lateral surfaces. 



FIG. 1159. Veins of the penis. (Testut.) 





