68 HEALTH AND DISEASE 



secretion is constantly being thrown out to lubricate the surface. By this 

 meaas the scrotum is enabled to move freely over the thighs without 

 irritation. 



The dartos is a thin pinkish-yellow layer of involuntary muscle and 

 elastic fibres, largely interspersed with connective tissue. It is situated 



225. — View of the Male Genital and Urinary Apparatu 



A, Cowper's Glands, b, Prostate Gland, c, Dilated portion of Spermatic Duct. D, Vesicula 

 Seminalis. E, F, Ureters, g, g, Spermatic Vessels and Duct passing through the internal abdominal 

 ring on their way to the Testicle. H, Bladder. I, Layer of Peritoneum. 



beneath the skin, and forms a pouch for each testicle by interposing a 

 partition (septum scroti) between one organ and the other. 



When the dartos contracts the testicle is raised in the purse; at the 

 same time the skin is corrugated. 



VesiculSB Seminales. — Two small elongated sacs situated on the upper 

 surface of the bladder (fig. 225 d); they form reservoirs for the reception 

 of the semen, and secrete a fluid accessory to that of the testicles which is 

 mixed with it. As we have already seen, the duct of each of these bodies 

 unites with that of the corresponding vas deferens to form the ejaculatory 



