Franklin P. Mall 281 
it will be found that in successful cases these terminal veins with the 
capillaries arising from them are filled. Figures 44 and 45 show this 
distribution from the tips of the portal and hepatic veins, marking the 
centers of the portal unit and the hepatic lobules. Both are drawn to the 
same scale and show the relative arrangement of their capillaries. 
The portal twigs give rise to capillaries only at their ends, while in the 
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Fic. 47. Tracing of the vessels around a lobule showing the relative 
number of terminal and hepatic and portal branches. X 40. Portal vein 
slightly injected. 
hepatic the origin of the capillaries extends much farther down the 
vein than is shown in the drawing. The portal vein lies of course in an 
interlobular space and its three main branches extend into the adjoining 
fissures. Together they mark the center of a portal unit. Figure 46 
shows the arrangement of the capillaries throughout a nodal point. The 
