. On diseases of the liver. dmirable paper onthe Liver in the Transactions of the Royal Society for 1833, by Mr. Kiernan, towhom we are in great part indebted for the exact knowledge we now have of thedistribution of bloodvessels in the liver, and of many other points of its structure. HEPATIC VEINS. 25 The hepatic veins are not accompanied by any other vessels, andare not surrounded by areolar tissue. They are, in consequence,everywhere in immediate contact with lobules, and do not collapsewhen cut across. In the small branches, the coats are thin andtransparent, and capillaries, or the ultim
. On diseases of the liver. dmirable paper onthe Liver in the Transactions of the Royal Society for 1833, by Mr. Kiernan, towhom we are in great part indebted for the exact knowledge we now have of thedistribution of bloodvessels in the liver, and of many other points of its structure. HEPATIC VEINS. 25 The hepatic veins are not accompanied by any other vessels, andare not surrounded by areolar tissue. They are, in consequence,everywhere in immediate contact with lobules, and do not collapsewhen cut across. In the small branches, the coats are thin andtransparent, and capillaries, or the ultimate twigs formed from thecapillaries, enter them directly on every side. In the largerbranches, the coats are thicker and opaque, and the ultimate twigsunite to form larger twigs before they enter the vein. This isshown in Fig. 4, copied on a smaller scale from a diagram by The trunks and large branches of the hepatic vein, likethe iliacs and the inferior vena cava, contain longitudinal (muscular)fibres. Fig. ir, longitudinal section of an hepatic vein; a a, portions of the canal, from which the vein has heenremoved ; b b, orifices of ultimate twigs of the vein, formed hy the capillaries of single lobules. To complete our view of the bloodvessels of the liver, we mustnow consider the hepatic artery. We have already seen that a branch of the artery accompanieseach branch of the portal vein and hepatic duct. It has beenshown by Mr. Kiernan, that the hepatic artery is distributed to,and nourishes, the coats of the gall-bladder and gall-ducts, the liga-ments of the liver, its capsule, and the coats of the portal and 26 INTRODUCTION. Fig. 5. hepatic veins; and that the blood conveyed to all these parts bythe artery passes into veins which terminate in branches of theportal vein, and thus traverses the capillary plexus of the lobules,like blood returned from the other abdominal Theseveins, which originate in the liver, and feed the portal vein withthe blood
Size: 1289px × 1939px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, bookpublisherphila, bookyear1857
