Ai'teries of the Trunk. 



431 



Ramus tubarius 



Tuba uterina ' 



[Falloppii 



I 

 I 



A. uterina 



Ureter 



Vesica urinaria . 



A. vesicalis inferior 



Vagina / 



A. vesicalis inferior, yi^ 

 brandies to tlie vagina'^ 



M. levator ani 



Intestinum rectum 



472. Arteries of the uterus and surrounding 



structures, viewed from behind and somewhat from the left. 



(On the left side the ovary, the Fallopian tube and the ligamentum teres uteri have been 



displaced from their normal position.) 



Jt:^ k. pudenda iuterua (see Figs. 468, 473 and '474) goes dowBward at the lower 

 mai^gin of the m. piriformis behind the lig. sacrospinosum, lies on the medial surface of the 

 tuber ischiadicum and passes forward, in the form of a curve, upon this and on the medial 

 surface of the ramus inferior ossis ischii; in its course it runs somewhat above the processus falci- 

 formis and is covered bj' the fascia obturatoria; close behind the m. transversus peruiei super- 

 ficialis it divides into the a. jjerinei and the a. penis (or a. clitoridis). It always gives off small 

 branches to the surrounding muscles and nerves, and often, also, the a. haemorrlioidalis media. 



1) A. haemorrlioidalis inferior (0. T. external or inferior haemorrhoidal artery) (see Figs. 473 



and 474) usually double or triple. It runs, transversely medianward through the fat of 

 the fossa ischiorectalis, being fairly superficial, to the fat, piuscles and skin about the anus. 



2) A. pei-inei (0. T. superficial, perineal artery) (see Figs. 473 and 474) extends, over or 



under the m. transversus perinei superficialis, forward and medianward; it is superficial, 

 being covered only by the fascia superficialis perinei; it goes in the male to the posterior 

 surface and to tlie septum of the scrotum by means of the aa. scrotales posteriores, 

 in the female into the labium majus and labium minus by means of the aa. lahiales 

 posteriores. It also gives off small branches to the superficial muscles of the perineum. 

 3a) A. penis (in the male only) (see Figs. 46S, 473, 658, 673 and 677) runs forward, in 

 the direction of the main stem, close to the ramus inferior ossis pubis, within the 

 trigonum (diaphragma) urogenitale until it lies below the lig. arcuatum pubis where 

 it is continued directly into the a. dorsalis penis. Branches: 



aa) A. btdbi nrethrae '(0. T. artery of the bulb) (see Fig. 473) goes off at the posterior 

 margin of the trigonum urogenitale and runs medianward and forward to the bulbus 

 urethrae and to the neighboring muscles. 



ab) A. xirelhralis (see Fig. 473) forward and medianward to the corpus cavernosum urethrae. 



- 28* 



