268 CIRCULATORY SYSTEM. 



The Capsular Veins (Vence Capsulares) arise from the arte- 

 ries spent upon the capsulaB renales; and are two in number, 

 one on each side. That on the right discharges into the vena 

 cava, while the one on the left empties into the left emulgent 

 most frequently. 



The Hepatic Veins (Vense Hepaticce) take their rise in the 

 liver, and collect into three principal trunks, which converging 

 towards the ascending cava, discharge themselves into it, 

 where it adheres to the posterior margin of the liver, imme- 

 diately below the diaphragm. Two of these trunks come from 

 the right lobe, and one from the left, moreover, there are 

 several small hepatic veins which discharge themselves into 

 the cava, and come principally from the Lobulus Spigelii. 



The Inferior Phrenic Veins (Vense Pkrenicse Inferiores) 

 come from the diaphragm, from the corresponding arteries. 

 They are two in number, and discharge into the ascending 

 cava just above the hepatic veins. 



SECT. V. OF THE VENA PORTARUM. 



The Vena Portarum is derived from, the viscera of the abdo- 

 men, and presents the singularity of a vein ramifying through 

 a gland, the (liver,) before its blood is returned to the general 

 circulation. The arteries from which it draws its supply of 

 blood are the superior and the inferior mesenteric, and the 

 coeliac with the exception of its hepatic branch. The viscera 

 of the abdomen, which contribute to it are the spleen, the gall- 

 bladder, the pancreas, the stomach, the small and large intes- 

 tines, and the large and the small omentum. 



a. The Splenic Vein (Vena Splenica) is formed by several 

 branches, which coming out distinctly from the fissure of the 

 spleen, unite after a short course into a single trunk. This 

 trunk runs in company with the splenic artery below it, along 

 the superior margin of the pancreas, it is not quite so tortuous 

 as the artery itself, and proceeding from left to right, is joined 

 to the superior mesenteric vein in front of the vertebral co- 

 lumn. 



