. Anatomy, descriptive and surgical. t lumbar vertebra: the superior mesenteric artery and vein,the inferior mesenteric vein, the commencement of the vena portee, the vena cava,the aorta, the left renal vein, and the crura of the diaphragm. The upper border is thick, and has resting upon it, near its centre, the coeliac 57 898 ORGANS OF DIGESTION. axis; the splenic artery and vein are lodged in a deep groove or canal in this border; and to the right the first part of the duodenum and the hepatic artery are inrelation with it. The lower border, thinner than the upper, is separated from the tran
. Anatomy, descriptive and surgical. t lumbar vertebra: the superior mesenteric artery and vein,the inferior mesenteric vein, the commencement of the vena portee, the vena cava,the aorta, the left renal vein, and the crura of the diaphragm. The upper border is thick, and has resting upon it, near its centre, the coeliac 57 898 ORGANS OF DIGESTION. axis; the splenic artery and vein are lodged in a deep groove or canal in this border; and to the right the first part of the duodenum and the hepatic artery are inrelation with it. The lower border, thinner than the upper, is separated from the transverse portionof the duodenum by the superior mesenteric artery and vein ; to the left of these theinferior mesenteric vein ascends behind the pancreas to join the splenic vein. The pancreatic duct, called the canal of Wirsung, from its discoverer, extendstransversely from left to right through the substance of the pancreas, nearer to itslower than its upper border, and lying nearer its anterior than its posterior surface. Fig. The Pancreas and its Relations. In order to expose it the superficial portion of the gland must be removed. It com-mences by the junction of the small ducts of the lobules situated in the tail of thepancreas, and running from left to right; it constantly receives the ducts of thevarious lobules composing the gland, and, considerably augmented in size, thenleaves the head of the pancreas. Descending slightly, it gets into relation with thecommon bile-duct, lying to its left side; and, passing very obliquely through themucous and muscular coats of the duodenum, it terminates by an orifice common toit and the ductus communis choledochus upon the summit of an elevated papilla sit-uated at the inner side of the descending portion of the duodenum, a little below itsmiddle. Sometimes the pancreatic duct and ductus communis choledochus open sepa-rately into the duodenum. The excretory duct of the lesser pancreas is called theductus pancreaticus minor; it o
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