242 SPECIAL ANATOMY. 



476. 1. The Scrotum, op*sov, 



is a pouch-like elongation of the external skin which hangs down 

 before the perinaeum between the legs, and encloses both the 

 testicles. 



This skin is brownish, thin, and without adipose tissue, 

 wrinkled, loose, and large in warmth, dense, strong, and tightly 

 applied in the cold ; beset with delicate and curled (it is said ob- 

 liquely placed) hairs and many sebaceous glands. 



In its centre a linear suture-like elevation, raphe, passes from 

 the anus to the root of the penis, which is bounded before by the 

 root of the penis [sometimes extends along itj behind by the 

 anus, and indicates the place where inside the Scrotum a vertical 

 septum passes off from the Dartos between the testicles -tunica 

 dartos, is a red, dense, and very vascular membrane of contractile 

 uniting tissue, which is firmly applied to the internal surface of 

 the scrotum, and only loosely to the tun. vaginalis communis. 

 The uniting tissue between the last continues into the fascia 

 femor. and abdominal, superfic., and becomes changed by pres- 

 sure into a membrane (e. g., of w r ater). The partition in the 

 central line, septum scroti, consists of fibrous and common uniting 

 tissue. The dartos above, close to the spermatic cords, is sup- 

 plied with uniting tissue containing much adipose, and it does 

 not pass into the fascia superficial. 



Vessels : Artt. and Vv. scrotales anteriores (branches of pudenda externa and 

 epigastrica) ; posteriores (branches of pudenda communis'). 



Lymphatics: numerous; they enter into the inguinal glands. 



Nerves : branches of the ileo-inguinal., spermatic, extern, pudendus and cutan. 

 femor. posterior communis. 



477. 2. The testicles, testes, testiculi s. didymi, are two 

 oval glands lying under the penis, which until towards the end of 

 embryonic existence lie in the abdomen, but later, enveloped in 

 a peculiar and common vaginal membrane, inside the Scrotum, 

 and the left rather lower than the right. Length : two inches. 

 Breadth: one inch. Thickness: six lines. Weight: one half to 

 one ounce. Each testicle consists of two parts. 



a. The proper testicle, testis,bp%is, is egg-shaped, rather flat on 

 the sides, smooth, and yielding (about as much as the eye), of a 

 whiter hue (tunica albuginea}. Its superior extremity looks 

 forwards, the inferior backwards ; the anterior border downwards, 

 the posterior with the epididymis, upwards. 



Structure. The parenchyma (pulpa testis) is soft, doughy, yellowish red ; 

 it consists, principally, like that of the kidney, of numerous and many times 

 convoluted tubules, tubuli semiferi, which, surrounded by capillary and nervous 

 rete, are associated by uniting tissue into longitudinal lobules, and are sur- 

 rounded as a whole by a fibrous capsule (tunica albuginea s.propria), which 



