Chap. XXI] 



SUMMARY 



467 



Testes 



Structure 



Location 



Function 



Two glandular organs which produce the spermatozoa. 



Testicle proper — ovoid body covered by fibrous 

 tissue. Central portion consists of irregular 

 cavities filled with seminiferous tubules and 

 blood-vessels. 

 Epididymis — tortuous tubule, forms long, 

 narrow body which lies along posterior por- 

 tion of testes. 

 (In early foetal life in abdomen below kidneys. 

 Before birth is normally drawn downward to 

 scrotum, and is suspended by spermatic cord, 

 f Production of spermatozoa. 

 I Production of internal secretion. 

 Vas Deferens — Continuation of epididymis, and serves to connect the 

 epididymis and the seminal vesicle of each side. 

 Two pouches located between bladder and rectum on outer 

 side of each vas deferens. Connect vas deferens with 

 ejaculatory duct. 

 Function — Serve as reservoirs for semen, to wliich they add 



a secretion of their own. 

 Formed by union of seminal vesicles and vas deferens of 



each side. 

 Run downward, converge, pass between lobes of prostate gland 

 and open into the floor of the prostatic portion of the urethra . 

 Pouch wliich contains testes and part of each spermatic cord. 

 Covered with thick dark skin. 

 Dartos — reddish tunic under skin, consists of 

 muscular and elastic tissue with numerous 

 blood-vessels. Divided by septum into two 

 halves. 

 ' Consists of the vas deferens, arteries, veins, lymphatics, 

 nerves, and layers of fascise connected by areolar tissue 

 and serving as pedicle for testes. 

 Extends from the internal abdominal ring to the back of 

 the testes. 

 ( Consists of three cylindrical J 1. Corpora cavernosa. 

 I bodies of erectile tissue I 2. Corpus spongiosum. 

 { Contains urethra wliich extends from bladder to the end of 

 penis. 

 Covered with skin and mucous membrane. 

 ' Extends from the bladder through the corpus spongiosum 

 to the end of the penis. Length 8 inches. 

 ( Prostatic portion. 

 Divisions < Membranous portion. 



I Penile or spongy portion. 

 Consists f Mucous fining. 



of I Numerous muscular fibres. 



Seminal 

 Vesicles 



Ejaculatory 

 Ducts 



Scrotum 



Structure 



Spermatic 

 Cords 



Penis 



Urethra 



