THE PROSTATE GLAND. 



243 



concentric striation and a light brownish color. Their nature is uncertain, 

 but they probably consist of modified secretion and contain a colloid substance. 



Terminal duct opening into alveoli 

 Involuntary muscl 



Interlobular 

 connective 

 tissue 



Alveoli 



Blood-vessel 



FIG. 293. Transverse section of prostate gland. X 7$. 



The secretion of the prostate gland is turbid or milky in appearance, 

 thin in consistence, slightly alkaline in reaction and possesses a characteristic 



Muscle cell 



Small concretion 



Epithelium 

 lining alveoli 



Interalveolar 

 tissue 



Blood-vessel 



FIG. 294. Section of prostate gland, showing details of alveoli. X 270. 



odor. It is discharged into the urethra and mingled with the fluid entering 

 by the spermatic ducts during ejaculation, and probably serves an important 

 purpose in facilitating and perhaps stimulating the motility of the sperma- 



