. On diseases of the liver. he portalvein that go to define the lobules, all the capillaries of the lobuleswill be full, except those immediately surrounding the portal section of the liver will still present a mottled appearance, butnow the pale portions will be in spots, where the uninjected twigsof the portal vein are divided, and the red portion will form a bandcontinuous throughout the liver. (Fig. 10.) When the entire capillary network is filled, the whole liver isred, but, as was observed by Mr. Kiernan, the central portions ofthe lobules are still usually of a deeper red than t
. On diseases of the liver. he portalvein that go to define the lobules, all the capillaries of the lobuleswill be full, except those immediately surrounding the portal section of the liver will still present a mottled appearance, butnow the pale portions will be in spots, where the uninjected twigsof the portal vein are divided, and the red portion will form a bandcontinuous throughout the liver. (Fig. 10.) When the entire capillary network is filled, the whole liver isred, but, as was observed by Mr. Kiernan, the central portions ofthe lobules are still usually of a deeper red than the marginalportions. It appears, then, that after death the blood in the liver tends tocollect especially in the central portions of the lobules. An opiuionhas been expressed by Mr. Bowman, that this circumstance is owingto the capillaries in the marginal portions of the lobules being sub-ject to greater pressure, in consequence of the cells being thereoften more distended with oil and larger. COLOR OF THE 10. 37. Lobules on the surface of the liver, a, centres of the lobules, red from congestion of the hepatictwigs and adjacent capillaries ; c, places where capillai-ies uniting contiguous lobules are con-gested; b, pale spots, where the capillaries springing from the portal twigs are uninjected.(Diagram after Kiernan.) Many circumstances, to be noticed in the following pages, leavelittle doubt that this opinion is true. When, for example, the liver is in a state of fatty degeneration,and the cells in the lobules are everywhere gorged with oil, andalso in what has been termed the scrofulous enlargement of theliver, where the lobules are enlarged by the infiltration of somemorbid deposit, the capillaries of the lobules are usually emptythroughout, and the entire substance of the liver is, in consequence,unusually pale. Again, when, from the retention of biliary matter, the cells in themarginal portions have a yellow tinge, it often happens that whilethe centres of the
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