. The comparative anatomy of the domesticated animals. Veterinary anatomy. 424 THE DIGESTIVE AFPABATUS IN HORIZONTAL SECTION OF THREE SUPERFICIAL LOBULES, SHOWING THE TWO PRINCIPAL SYSTEMS OF BLOOD-VESSELS. a, a, Intralobular veins, terminating in the hepatic veins; 6, 6, Interlobular plexus, formed by branches of the portal vein. directed from the periphery towards the centre of the lobule, where they unite to form the afferent vessel. It results from this arrangement that the hepatic cells which fill the spaces ^^' * between the vessels are placed in radiating series. Efferent ser
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 424 THE DIGESTIVE AFPABATUS IN HORIZONTAL SECTION OF THREE SUPERFICIAL LOBULES, SHOWING THE TWO PRINCIPAL SYSTEMS OF BLOOD-VESSELS. a, a, Intralobular veins, terminating in the hepatic veins; 6, 6, Interlobular plexus, formed by branches of the portal vein. directed from the periphery towards the centre of the lobule, where they unite to form the afferent vessel. It results from this arrangement that the hepatic cells which fill the spaces ^^' * between the vessels are placed in radiating series. Efferent series.—Situated in the centre of the lobules, this vessel receives all the ramifications of the capillary plexus, and is named the intralobular or central supra- Jiepatic vein. It is voluminous, and communicates with the other intralobular veins. (These intra- lobular veins terminate in the larger trunks that run along the bases of the lobules, and are named the suhlohular veins.) Lymphatics,—In a hepatic lo- bule are found very fine lymphatic vessels that surround the branches of the hepatic plexus, where they form the lymphatic vaginaB, or canals which contain the blood- vessels. Connective tissue.—The intra- lobular connective tissue is scanty, the lobule being almost entirely composed of cells or capillaries; so that only some trabeculaB exist around the lymphatic sheaths. There is, however, a larger quantity in the inter- lobular spaces; and in some animals—especially the Pig —Glisson's capsule sends somewhat thick lamellaB of connective tissue between these lobules. Excretory Apparatus.— This is very simple in Soli- peds, and is composed of a vessel named the ductus chole- dochus, resulting from the union of several trunks lodged in the posterior fissure of the liver, and which come from the three lobes. Traced in the substance of the hepatic tissue, these branches divide into more and more attenuated ramuscules that arise from the periphery of the lobules, and
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectveterinaryanatomy
