THE HEPATIC LOBULE AND ITS RELATION TO THE DISTRIBUTION OF BLOOD VESSELS AND BILE DUCTS IN THE FOWL

Abstract

The distribution of blood vessels and bile ducts of the liver was studied with celluloid-acetone and acrylic resin cast preparations. The riglnt hepatic hilus is composed of theright portal vein, the right hepatic artery, the Ductus hepatoentericus, autd the Ductushepatocysticus. The left hepatic hilus consists of the left portal vein and the left hepaticartery (Fig.lB). The small Robe is located between the right and the left lobe. Theventral portion of the left lobe is subdivided into the lateral and medial portions (Figs. IAand JB).The Venae laepaticae consist of the Vena ltepatica dextra coming out of tlae rightRobe and the Vena hepatica sinistra collecting the Ramus lateralis lobi sinistri, the Ramusmedialis lobi sinistri, the Ramus dorsalis lobi sinistri, and a branch coming out tlae smallRobe. Tlae small Vena laepatica accessoria enters tlte Vena cava separately, as shown inFig. 4. The umbilical vein (black; arrow in Figs. IA and 4).flows into tlte Vena hepaticasinistra witltout supplying tlte left Robe (Figs. IA and 4). Tl?e Venae portae hepaticae consist of the Vena portae dextra and sinistra. Theformer branches iutto the Truncus dexter and the Truncus sinister near the right hepatichilus, and supplies each lobe. The latter communicates with the Ramus lateralis lobisinistri of the Truncus sinister and supplies the lateral portion of the left lobe (Fig. 6).The Arteria hepatica dextra supplies the right lobe and the Arteria hepatica sinistratire left lobe. Both arteries are connected with each other by the Ramus communicanswhich runs along the left trunk of the portal vein (Fig. 8).The Ductuli biliferi dextri collect bite ducts from the right lobe and the Ductulibiliferi sinistri from the left lobe. The former communicate with the latter to form theDuctus hepatoentericus, which opens into the duodenum. The Ductus hepatocysticuswhicla branches from the right bite duct enters the gallbladder, from which the Ductuscysticoentericus originates and opens into the duodenum (Figs, 3 and 10).The variation in the ramification of blood vessels and bite ducts is described andillustrated (Figs. 5, 7A, 7B, 9A, 9B, IIA, and IIB).