VISCERAL ANATOMY. 1415 



Coats. 



Peritoneal or serous (external), covers only its anterior half; 

 passes back farther superiorly. Forms three ligaments, one an- 

 terior, two lateral. 



Muscular, of unstriped tissue of longitudinal, oblique and cir- 

 cular fibres. The latter very marked at the neck, the sphincter. 



Mucous. Pale, covered with stratified and flattened epithelium, 

 and contains simple glands. 



Vessels. Internal pudic and umbilical. 



Nerves. Pelvic plexus and last two sacral. 



For urethra in male, see Penis; in female, see External Gen- 

 itals. 



MALE GENITAL ORGANS. 



THE TESTICLES. 



The testicles are two oval tubular glands lying on either side of 

 the penis and enveloped in a double bag of the abdominal skin 

 and fascia, the scrotum. 



Coverings. 



1. Scrotum, of skin, with many sebaceous glands. 



2. Dartos, two pouches of contractile tissue, in contact in the 

 median line, the septum scroll. 



3. Cremaster, from the ilio-lumbar aponeurosis to the outer 

 side of the next covering. 



4. Fibrous tunic (infundibuliform fascia), covers the whole 

 testis, and is a process of the transversalis fascia. 



5. Tunica vaginalis is a short serous sac, enveloping each 

 testicle, derived from the peritoneum. It forms a covering for 

 the spermatic cord, and below is divided into a visceral layer, 

 covering the testicle and epididymis, and a parietal lying inside the 

 fibrous covering.. 



Its cavity contains some fluid, serous in character. 



Parenchyma. This consists of the testis proper and a number 

 of seminal tubes, which together form a body lying on top of the 

 testis the epididymis. 



Fibrous membrane (or tunica albuginea) is a strong fibrous 

 envelope, which sends in prolongations or trabeculae to its inte- 

 rior, dividing it into lobules. At its upper border and in front 



