244 A Study of the Structural Unit of the Liver 
TABLE VI. 
Giving the vascular bed of the dog’s portal system. 
Area 
Vessels Number Diameter of 
Section 
mm. sq. mm. 
Tel PROTCAINEVCITIN Tir. sic onc dates areeer hee ra oreuctekeere il 9.0 64.0 
Branches of the first order............ 6 5.0 118.0 
Branches of the second order.......... 70 iLa7 159.0 
[2p Branches of the thind) onder os....5..-- 700 8 352.0 
Branches of the fourth order.......... 8,000 4 1,005.0 
Branches of the fitth onder... co... 80,000 na Liss 1,414.0 
[3] Branches of the sixth order (interlobu- 
QT) Ai ASS ya casaetecetetelegetene eseectoee reese tailors. as 960,000 .05 1,881.0 
[4 Capilllanieseyriacten-racmciclen cece 1,850,000,000 .008 92,900.0 
Sixth order of hepatic vein (central)™ 480,000 .09 2,900.0 
Hitth order of whepatichvein=eere oss. oe 80,000 ally 1,816.0 
Hourth) order, of hepatic sveinen cee. ee 8,000 5 Ae Hala) 
TRhird oOrdervot HepatiGmvelmectm sere cel 700 1.0 410.0 
Hirstorder ok hepatic weinke.s seo: 70 2.0 220.0 
Second order of hepatic vein.......... 7 5.0 134.0 
FIG PAtiC PaVelN aise ea See ore ere eke 1 iLO 95.0 
ARTERY. 
full EVE paticzarteiyaryrvtos aem tytn il 2.75 5.9 
Zip Branches vombhelgiverc.mpicmeierrioretetr 2 1.18 2.2 
Branches of the first, ordereen«.)) see eee 6 8 3.0 
Branches of the second order......... 70 iz 4.9 
Branches of the third order........... 700 ail 5.5 
[3] Branches of the fourth order.......... 8,000 .05 157 
Branches of the fifth order............ 80,000 .02 25.0 
Branches of the sixth order ........... 960,000 .009 61.0 
(PATE apilllaiess wakes oi etok os asceeates tore: eebe Pelee 1,850,000,000 .008 92,900.0 
“The area of the hepatic vein of a given order is about 50 per cent greater 
than that of both the hepatic artery and the portal vein. 
