INTERNAL PUDIC ARTERY. 



319 



nales, and the prostate gland ; and hamorrhoidal branches which supply 

 the middle of the rectum, and frequently take the place of the middle 

 haBmorrhoidal branch of the internal iliac. 



The branches given off externally to the pelvis, are the 



External hsemorrhoidal, 

 Superficialis perinei, 

 Transversalis perinei, 

 Arteria bulbosi, 

 Arteria corporis cavernosi, 

 Arteria dorsalis penis. 



The External hamorrhoidal arteries are three or four small branches, 

 given off by the internal pudic while behind the tuberosity of the ischium. 

 They are distributed to the anus, and to the muscles, the fascia, and the 

 integument of the anal region of the perineum. 



The Superficial perineal artery is given off near the attachment of the 

 crus penis ; it pierces the connecting layer of the superficial and deep 

 perineal fascia, and runs forward across the transversus perinei muscle, 

 and along the groove between the accelerator urinaB and erector penis to 

 the septum scroti, upon which it ramifies under the name of arteria septi. 

 It distributes branches to the scrotum, and to the perineum in its course 

 forwards. One of the latter, larger than the rest, crosses the perineum, 



Fig. 157* 



The arteries of the perineum; on the right side the superficial arteries are seen, and 

 on tke left the deep. 1. The penis, consisting of corpus spongiosum and corpus caver- 

 nosum. The crus penis on the left side is cut through. 2. The acceleratores urinso 

 muscles, enclosing the bulbous portion of the corpus spongiosum. 3. The erector penis, 

 spread out upon the crus penis of the right side. 4. The anus, surrounded by the 

 sphincter ani muscle. 5. The ramus of the ischium and os pubis. 6. The tuberosiiy 

 of the ischium. 7. The lesser sacro-ischiatic ligament, attached by its small extremity 

 to the spine of the ischium. 8. The coccyx. 9. The internal pudic artery, crossing the 

 spine of the ischium, and entering the perineum. 10. External hamiorrhoidal branches, 

 11. The superficialis perinei artery, giving off a small branch, transversalis perinei, 

 upon the transversus perinei muscle. 12. The same artery on the left side cut off. 13. 

 The artery of the bulb. 14. The two terminal branches of the internal pudic artery 

 one is seen entering the divided extremity of the crus penis, the artery of the corpus 

 cavernosum j the other, the dorsalis penis, ascends upon the dorsum of the organ. 



