268 



THE BLOODVESSELS, BY C. J. EBERTH. 



membrane, in consequence, assumes the appearance of a net- 

 work composed of fibres of varying thickness, or of a fenes- 

 trated membrane with plexiform thickenings. Large trunks, 



Fig. 44. 



Fig. 44. Endothelium of the carotid artery of Man, after treatment 

 with nitrate of silver, a, cells; b, clearer; c, darker intermediate 

 spaces ; d, intra-cellular circular and spotted markings. 



such as the axillary, carotid, pulmonary, crural, popliteal, and 

 hepatic arteries, instead of a simple elastic membrane, possess 

 two or three anastomosing lamellae, or plexuses of elastic tissue, 

 a clear, but slightly fibrous connective tissue filling up their 

 interspaces. 



INTERNAL FIBROUS COAT. With the above membrane is 

 associated a second, which, however, is not, as Henle* main- 



* Allgemeine Anatomic, p. 496. 



