Chap. 24*] Iliac Arteries, &. 249 



Near the laft lumbar vertebra, the aorta is divided 

 Into two equal trunks, called the common iliac arteries, 

 one of which lies to the right the other to the left,. and 

 which recede from each other as they defcend. About 

 three ringers breadth from their origin, each iliac trunk 

 is divided into two fecondary arteries. One of thefe, 

 which is called, from the parts on which it is diftributed, 

 the hypogaftric, or internal iliac artery, is gradually- 

 bent forwards, and terminates like a ligamentous cord 

 at the navel. The other artery is called the external 

 iliac, and pafles under the ligament of Fallopius, in its 

 way to the lower extremity, on which it is distributed. 

 From the convex fide of the curvature of the hypo- 

 gaftric artery are fentofffeveral confiderable branches, 

 which may be diftinguifhed by the following names ; 

 iliaca minor, facras laterales, glut^a, fciatica, pudica 

 communis, hsemorrhoidalis media, obturatrix. 



The iliaca minor is a fmall artery, which is diftri- 

 buted on the iliac mufcles and bones. The arteris 

 facrx laterales are commonly two in number. They 

 are fent to the fore part of the os facrum, and penetrat- 

 ing its fubflance, are diftributed to the nerves and 

 .membranes within. The arteria glutasa is of very 

 confiderable fize ; it pafles out of the pelvis with the 

 fciatic nerve, and is diftributed on the two larger glu- 

 tsei mufcles j it alfo gives branches to fome other 

 neighbouring mufcles, and to the parts about the anus. 

 The arteria fciatica gives fome branches to the os facrum 

 and adjoining mufcles. It pafles obliquely over the 

 fciatic nerve, and goes through the great pofterior finus 

 of the os ileum. It afterwards afcends on the outfide 

 of the os ileum, and is fpent on that and the glutaci 

 mufcles. The arteria pudica communis, or pudica 

 rnterna, divides into two branches j one of thefe runs 

 on the infide of the tubercle of the ifchium to where the 



corpora 



