VISCERAL ANATOMY. 131 



brane, the ampulla of Vater, in common with the pancreatic duct. 

 The horse has no gall bladder. 



Course of blood through the liver. 



The portal vein enters the posterior fissure, forming inter- 

 lobular veins; these form a network of veins between the cells, then 

 uniting, form the intra-lobular or central vein. 



The intra-lobular unite in the sub-lobular vessels, which are 

 quite numerous, ending as hepatic veins by opening into the 

 posterior cava. 



Lymphatics. 



Follow the vessels forming lymph spaces which, uniting, end 

 in the receptaculum. 



Arteries. 



Hepatic, from cceliac axis, ending in the lobular centres. 



Nerves. Solar plexus, tenth and phrenic. 



PANCREAS. 



This viscus resembles the salivary gland in structure, is situated 

 in the " sub-lumbar region, under the aorta and cava, and behind 

 the stomach and liver. 



Form, elongated, triangular or curved on itself. 



Weight, seventeen ounces. 



It has a superior and inferior surface, an anterior and posterior 

 border, a right extremity or head, and a left or tail, toward the 

 spleen. The posterior border is notched for the portal vein. 



Structure. 



Like the salivary glands, though its epithelium is rounded, not 

 columnar. 



Ducts. 



Principal (duct of Wirsung) runs along nearer anterior border 

 from tail to head, receives a number of branches, and opens into 

 duodenum in common with the bile duct. The accessory duct 

 opens alone after receiving several branches. 



Vessels. Hepatic and great mesenteric. 

 Nerves. Solar plexus. 



