. The comparative anatomy of the domesticated animals. Veterinary anatomy. OBGANS ANNEXED TO THE ABDOMINAL DIGESTIVE CANAL. 425 along with the principal pancreatic duct. The orifices of these two canals are surrounded by a circular mucous fold {ampulla of Vafer), which is usually very prominent, and acts as a valve in preventing the entrance of alimentary substances into the apertures it encircles; this office it fills so well, tliat it will not even allow the aii- with which the duodenum is inflated to pass mto the ducts. Fig. EXCRETORY APPARATUS OF THE HORSE'S LIVER. 1, Left lobe of th
. The comparative anatomy of the domesticated animals. Veterinary anatomy. OBGANS ANNEXED TO THE ABDOMINAL DIGESTIVE CANAL. 425 along with the principal pancreatic duct. The orifices of these two canals are surrounded by a circular mucous fold {ampulla of Vafer), which is usually very prominent, and acts as a valve in preventing the entrance of alimentary substances into the apertures it encircles; this office it fills so well, tliat it will not even allow the aii- with which the duodenum is inflated to pass mto the ducts. Fig. EXCRETORY APPARATUS OF THE HORSE'S LIVER. 1, Left lobe of the liver; 2, Middle lobe; 3, Right lobe; 4, Lobule of Spi^rel; 6, Posterior vena cava at its entrance into the liver; 7, Vena porta;; 8, Ductus oholedochus ; 9, Pancreatic duct; 10, Common entrance of these two ducts into the small mtestine. There enter into the structure of the ductus choledochus: 1, A fibrous membrane, which some anatomists believe contains unstriped muscular fibres; 2, Cylindrical epitJieUum; 3, Numerous racemose glands, opening on its inner surface by very small orifices. Vessels and Nerves of the Liver.—The blood-vessels are the hepatic artery, portal vein, and suprahepatic veins. The liepatic artenj is a branch of the coeliac, and enters the gland by the posterior fissure, in company with the portal vein and ductus choledochus. In the liver it divides into very fine ramifications which join the intra- lobular plexus, anastomose on the surface of the biliary ducts, or expand either on the serous membrane, or in the walls of the portal vein. The portal vein is the functional vessel of the liver. It reaches that organ by the posterior fissure, and Glisson's capsule accompanies its rami- fications as far as the hepatic lobules, where they form the plexus of sub- hepatic veins. The suprahepatic (or sublobular) veins are so named because they gain the antero-superior face of the viscus to open into the posterior vena cava. They carry away the blood that has be
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Keywords: ., bookauthorchauveauaauguste18271, bookcentury1800, bookdecade1870
