1104 UROGENITAL SYSTEM. 
pelvis towards the base” of the bladder, where it comes into relation with a 
branched tubular structure termed the vesicula seminalis. Joined by the duct of 
the vesicula seminalis, the vas deferens forms a short canal called the common 
ejaculatory duct, which terminates by opening into the prostatic part of the urethra. 
The prostate, a partly glandular, partly muscular structure, surrounding the first 
part of the urethra, and also a pair of small glandular bodies called Cowper’s glands, 
are accessory organs connected with the male reproductive system. The ducts of 
Cowper’s glands and those of the prostate, like the common ejaculatory ducts, open 
into the urethra, which thus serves not only as a passage for urie, but also for the 
generative products. The external genitals are the penis and scrotum. 
THE TESTIS. 
The male reproductive glands or testes are a pair of somewhat oval, slightly 
flattened bodies of a whitish colour, measuring about an inch and a half in length, 
one inch from before backwards, and rather less in thickness. Each testis or testicle 
is placed within the cavity of the scrotum in such a manner that its long axis is 
directed upwards, shghtly forwards, and outwards. The left testis occupies a some- 
what lower level than the right. The testis (Fig. 751) has two somewhat flattened 
surfaces, one of which, called the outer surface (facies lateralis), looks outwards and 
backwards ; while the other, or inner surface (facies medialis), looks inwards and for- 
wards. These two surfaces are separated by two rounded borders. Of these the 
anterior border (margo anterior) is the more convex, and is free, while the postervor 
border (margo posterior) is less rounded, and is the one by which the organ is sus- 
pended within the scrotum. To the posterior border is attached a structure called 
the epididymis, and also the lowest portion of the spermatic cord. Hach border ends 
Fic. 751. 
A. The right testis and epididymis, seen within the tunica vaginalis, which has been opened up. 
B. The right testis and epididymis seen from behind, after complete removal of the parietal portion of the 
tunica vaginalis. 
C. Diagram to illustrate the structure of the testis and epididymis. 
cv. Coni vaseulosi. rv. Rete testis. t.v. Tunica vaginalis. 
e. Epididymis. s. Septula testis. t.v’. Cut edge of tunica vaginalis. 
g.m. Globus major. s.c. Spermatic cord. v.d. Vas deferens. 
q.m’. Globus minor. s.t. Seminiferous tubule. v.e. Vas efferens. 
h, Hydatids. t. Testis. v.r. Tubuli recti. 
above in the upper and below in the lower extremity of the testis (extremitas 
superior et extremitas inferior). Owing to the obliquity of the long axis of the 
gland, the upper extremity of the testis les on an anterior and external plane to 
the lower one. 
Epididymis.— In connexion with the testis is the epididymis, which is 
composed of the first much convoluted portion of the duct of the gland. The 
epididymis is a somewhat crescentic structure, curved round the posterior border, 
