THE BLOOD-VESSELS. 



159 



blood-vessels and nerves. The arteries entering the gland-like 

 body become convoluted, and show numerous tubular, fusi- 

 form, or ampullar dilatations. Sometimes they have terminal 

 sacculi, closely resembling minute aneurisms, and giving the 

 organ its glandular appearance. Indeed, Luschka has called 

 them gland-tubules and vesicles. After death they are com- 



Fio. 73. Section of a naturally injected coccygeal gland : a, vessels ; B, collection of cells. Eberth. 



monly found to be empty, but by proper management a good 

 natural injection with blood may be readily obtained. Both 

 capillaries and veins also present lateral varicosities, studding 

 them in great number. All these vessels have the usual endo- 

 thelial lining. External to this there appear aggregations of 

 rounded or polygonal cells. They are furnished with nuclei, 

 and receive an investment corresponding to the vascular ad- 



