In 43 dogs two left and two right hepatic lobes were resected simultaneously. Microcirculatory bed was studied by vessel injection and morphometrically. The lobe area and the diameter of the central veins were stated to have a different morphometric index, that demonstrates the presence, in the dog liver, of certain lobar complexes arranged like druses in a rock crystal. Under extensive liver resection, in 15--20 days, a regenerative lobular hypertrophy with a further new formation of the hepatic lobes on the upper part of the liver complex was noted. The ways of extrasinusal blood outflow were examined.