THE INTERNAL PUDTC ARTERY. 



4-79 



(e) The transverse perineal artery (vi) generally arises in common with the 

 preceding, but it is sometimes a distinct branch of the pudic artery. Passing 

 inwards towards the central point of the perineum, it supplies the parts between the 

 anus and the bulb, and anastomoses with its fellow of the opposite side. 



(d) The artery of the bulb (v) arises from the pudic near the point where that 

 vessel enters between the layers of the triangular ligament. It runs inwards 

 between the fibres of the constrictor urethrse muscle, being placed usually about half 

 an inch from the base of the triangular ligament, and penetrates the bulb to be 

 distributed to the erectile tissue of the corpus spongiosum. It givea blanches to 



Fig. 383. DISSECTION OP THE PERINEUM 

 IN THE MALE. (Allen Thomson. ) 



The right side shows a superficial, the 

 left a deeper view. 



a, anus, with a part of the integu- 

 ment surrounding it ; b, left half of the 

 bulb of the corpus spongiosum, exposed 

 by the removal of the bulbo-cavernosus 

 muscle ; c, coccyx ; d, right ischial tube- 

 rosity ; e, e, superficial perineal fascia ; 

 f, fat occupying the right ischio-rectal 

 fossa ; g, glutens maximus muscle ; 1, 

 on the right transversus perinei muscle, 

 points to the superficial perineal artery 

 as it emerges in front (in this case) of 

 the muscle ; 1', on the left side, on the 

 surface of the triangular ligament, points 

 to the superficial perineal artery cut 

 short ; 2, on the right ischio-cavernosus 

 muscle, points to the superficial perineal 

 artery and nerves passing forwards ; 2', 

 on the left side, the same vessel and 

 nerves divided ; 3, on the right half of 

 the triangular ligament, points to the 

 transverse perineal artery ; 4, on the left 

 ischial tuberosity, points to the pudic 

 artery deep in the ischio-rectal fossa ; 

 5, 5', inferior hagmoi-rhoidal branches of 

 the pudic arteries and nerves ; 6, on the 

 left side, placed in a recess from which 

 the inferior layer of the triangular liga- 

 ment has been removed, in order to show 

 the continuation of the pudic artery, its 

 branch to the bulb, and Cowper's gland. 



Cowper's gland, and to the mem- 

 branous part of the urethra. 



Another smaller branch to 



the corpus spongiosum is frequently given off by the pudic artery near its bifurca- 

 tion, or by the artery of the corpus cavernosum. 



(e) The artery of the corpus cavernosum (art. profunda penis) (v) is slightly the 

 larger of the two terminal branches of the pudic trunk. It perforates the inferior 

 layer of the triangular ligament and enters the inner side of the crus penis, whence 

 it is continued forwards in the centre of the corpus cavernosum to the anterior 

 extremity of that body, giving off in its course numerous offsets to the erectile 

 tissue. 



(/) The dorsal artery of the penis (v) ascends to the upper surface of that organ 

 between the crus and the pubic symphysis. After piercing the suspensory 

 ligament, the artery runs forwards, between the median dorsal vein and the 

 corresponding nerve, to the neck of the penis, where it ends in offsets to the glans 



