1954 



HUMAN ANATOMY. 



with the seminal vesicle, a saccular organ representing an outgrowth from the main 

 canal. 



The Vas Deferens. — This tube (ductus deferens) extends from the epididymis 

 to the ejaculatory duct and includes almost the entire length of the spermatic duct, 

 with a diameter of from 2-3 mm. Beginning at tne globus minor as the direct con- 

 tinuation of the convoluted canal of the epididymis, the vas deferens is at first also ^'ery 

 tortuous, and by its windings forms a tapering mass (pars testicularis ) about 2.5 cm. 

 in length. From the latter the seminal duct is prolonged upward along the inner 

 side of the epididymis and behind the testis, becoming progressively less wavy and 



Fig. 1662. 



^^^:.;4S^:. 



External iliac 

 artery 



External iliac 

 vein 



Deep epigastric 

 artery 

 Spermatic vessels 



Internal abdominal 

 ring 



Obliterated 

 hypogastric artery 



Uracil lis 



Suspensory 

 ligament of penii 



Internal urethral orifice 



Fatty tissue 

 containing veins 



Pectinate septum — 1+^ 



Spongy urethra 



Navicular fossa 



Internal iliac 

 essels 



Ureter, pelvic 

 portion 



Vas deferens 



Ureter, entering 

 bladder 



Seminal \ esicle 

 Rectum 



Ejaculatory duct 



Prostatic urethra 

 and utricle 



Prostate 



Membranous urethra 



Bulb of cavernous body 



Bulbous urethra 



Scrotum 

 Dissection of sagittally cut pelvis, showing relations of organs after fixation by formalin injection. 



of larger and more uniform size (3 mm.) as it enters the spermatic cord. Although 

 the apparent entire length of the canal is about 30 cm. (12 in.), its actual extent is 

 some 45 cm. (18 in.) on account of the tortuosity of its first part. 



Within the spermatic cord (pars funicularis), accompanied by the deferential 

 artery and the posterior plexus of veins (Fig. 1670), the vas occupies a position 

 behind the other constituents of the cord, and may be recognized by the hard, cord- 

 like feel imparted by its thick fibro-muscular wall. The duct ascends almost verti- 

 cally to the pubic spine, and on gaining the abdominal wall passes through th% external 

 abdominal ring, traverses the inguinal canal, and completes its passage of the body- 



