620 



A MANUAL OF ANATOMY 



fully I inch below the subpubic angle, and it gives exit to the 

 membranous part of the urethra. From the circumference of the 

 opening an expansion is given off, which forms a fascial investment 

 for the bulb. 



Openings for the Arteries of the Bulb. — ^These are two in number, 

 right and left, and are situated one on either side of the upper part 

 of the urethral opening. 



Openings for the Arteries of the Corpora Cavernosa Penis. — ^These 

 are two in number, right and left, and each is situated in the lateral 

 attached border, under cover of the crus penis, about i inch below 

 the level of the subpubic angle. 



Openings for the Dorsal Arteries and Nerves of the Penis. — These 

 are two in number on either side, and are situated high up, 



Crus Penis (cut) 



Artery of Corpus Cavernosum 



Opening for 

 Artery of the Bulb 

 Opening for Cowper's Duct 



Antero-inferior Layer of --^ 



Triangular Ligament 



Openings for SOperficiaL 



Perineal Vessels 



and Nerves 



Urethral Opening '\ 



Base of Triangular Ligament 



Fig. 276. — The Triangular Ligament of 

 (The antero-inferior layer has been removed 



Opening for Dorsalis 



Penis Vein 

 -.-Dorsalis Penis Artery 



^, Artery of the Bulb 



Dorsalis Penis Nerve- 

 \ Internal Pudic Vessels 



Postero-snperior Layer of 

 Triangular Ligament 



THE Urethra 

 on the left side). 



being near the subpubic angle, and close to the descending pubic 

 ramus, the opening for the artery being internal to that for the 

 nerve. It is to be noted that the dorsal vein of the penis has a 

 special opening, which is situated in the median line between the 

 subpubic and transverse pelvic or perineal ligaments. 



Openings for the Superficial Perineal Vessels and Nerves. — ^These 

 are situated, on either side, in the base at the line of junction with 

 the fascia of CoUes. 



Openings for the Ducts of Cowper's Glands. — Each of these is 

 situated on either side of the urethral aperture a little behind and 

 below the opening for the artery of the bulb. 



Chief Relations — Antero-inferior. — ^The bulb of the urethra, and 

 the crura penis, covered by their respective muscles, the superficial 

 transverse perineal muscles, and the fascia of Colles. Postero- 



