THE MALE ORGANS OF GENERATION 293 



What relation does it have to the urethra? 



What are Cowper's glands? 



Describe the penis. 



What is erectile tissue? 



Describe the testes. 



What is the tunica vaginalis? 



What are the seminiferous tubules? 



Describe the epididymis. 



What is the vas deferens? 



What is the scrotum? 



Describe the seminal vesicles. 



Describe the semen. 



What are spermatozoa? 



What is the function of the spermatozoon? 



Describe the fertilization of the ovum. 



