THE PENIS. 397 



The prostate is pierced by the ejaculatory ducts and 

 urethra. The ducts empty anterior to the veru montanum, 

 on the floor of the prostatic urethra. The prostate is of 

 a grayish color, and consists of a stroma of involuntary 

 muscular tissue and some connective tissue. It is invested 

 by a fibre-muscular capsule. A muscular investment is 

 also given to the urethra, as it runs through the prostate. 

 In the alveoli of the sponge-work of muscle and some 

 fibrous tissue is the glandular substance of the prostate. 

 It is composed of dilated follicles, which empty into 

 ducts. They open on the floor of the prostatic urethra. 

 The prostate undergoes changes at different ages; thus, 

 it is relatively slightly developed in infancy, and very apt 

 to undergo great enlargement at old age, and may become 

 infiltrated with small calculi of organic matter and car- 

 bonate of lime. 



COWPER'S GLANDS. 



Between the two leaflets of the deep perineal fascia 

 are Cowper's glands, each about the size of a pea. They 

 are of a grayish color, and each has a duct which opens 

 on the floor of the bulbous urethra. 



THE PENIS. 



The penis is the genito-urinary organ, composed of 

 erectile tissue. Its lower portion transmits the urethra. 

 It presents for examination a root, a body, and the glans. 

 The root consists of two crura, which are attached to the 

 ascending rami of the ischia and descending rami of the 

 pubes. Anterior to the symphysis pubis they join and 

 form the corpora cavernosa. A fibrous ligament passes 

 down from the pubes and constitutes the suspensory 

 ligament of the penis. The body of the penis is that 

 portion between the root and the glans. In the flaccid 

 state it is cylindrical and pendent; in the erected state it 



