VISCERAL ANATOMY. 1 45 



Coats. 



Perito7ieal 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 ; m female, see External Geni- 

 tals, 



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. Darfos, two pouches of contractile tissue, in contact in the 

 median line, the septum scroti. 



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

 side of the next covering. 



4. Fibi'ous 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 trabeculse to its inter- 

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



