io5 



tissue is arranged in an outer more deeply stained border, 

 the cortical zone, and a central portion, the medulla. In 

 the cortex the granular cells are arranged in small groups 

 in its peripheral portion; this is called the glomerular zone. 

 Then comes a broad area, in which the cells are arranged 

 in quite regular columns, the fascicular zone. Finally 

 there is a third stratum next to the medulla in which 

 anastomosing strands of cells are made out ; this is the 

 reticular zone. In the medulla are to-be seen cords of 

 irregular, pigmented cells, between which large vascular 

 spaces are found. Sketch a band through the cortex and 

 medulla as seen under high power. 



(f) Prostate. 



The prostate of a dog was divided transversely into several 

 pieces, hardened in mercuric chloride, stained in Delafield's heema- 

 toxylin, and sectioned. The sections were fixed to cover glasses, 

 and counter-stained in eosin, dehydrated, and cleared in oil of ber- 

 gamot and xylol. Mount on balsam. 



Study first under low power. The capsule of the pros- 

 tate is made up largely of non-striped muscle tissue and a 

 small amount of fibrous tissue. From the capsule fibro- 

 muscular trabeculse pass toward the urethral canal, form- 

 ing a framework for the glandular structure. The glands 

 are compound tubular. The secreting tubules are lined by a 

 single layer of short columnar cells. The gland ducts 

 which empty into the urethra are relatively large, and 

 lined for a distance with transitional epithelium. In the 

 outer portion of the prostate, and here and there in the 

 trabeculse between the glands, smaller or larger sympa- 

 thetic ganglia are to be seen. The prostatic urethra is lined 

 by transitional epithelium. Sketch about i of the section 

 as seen under low power, and a portion of one of the glands 

 as seen under high power. 



