PANCKEAS. 



1205 



in its right half, it is continuous with the neck ; whilst to the left of this it is separated 

 from the neck by a deep notch, incisura pancreatis, in which lie the superior mesenteric 

 vessels (Fig. 946). Its right and inferior borders are moulded on to the side of the 

 duodenum, which lies in a groove of the gland substance the bile-duct being interposed 

 as far down as the middle of the descending part of the duodenum. The posterior 

 surface of the head is applied to the front of the vena cava inferior ; it also lies on 

 the right renal vessels and the left renal vein, and, at its left end, on the aorta as well. 

 Its anterior surface is in contact above and on the right with the beginning of the 



Top of omental bursa 



Inferior vena cava 

 Lesser omentum (cut) 



Right triangu 

 ligament of live 



Left triangular ligament of liver 



(Esophageal opening in diaphragm 

 ' Gastro-phrenic ligament 



/ Corresponds to ' uncovered area ' of stomach 

 Gastro-splenic ligament (cut) 



Transverse colon crossing duodenum 



Head of pancreas 

 Gastro-colic ligament (cut) 



Part of omental bursa 



Phrenico-colic ligament 



Left end of transverse mesocolon 

 Left colic flexure 

 Transverse mesocolon (cut) 

 Root of mesentery (cut) 



FIG. 947. THE PERITONEAL KELATIONS OF 'THE DUODENUM, PANCREAS, SPLEEN, KIDNEYS, ETC. 



transverse colon (Fig. 947), without the interposition of the peritoneum as a rule. Below 

 this it is clothed by peritoneum, and is covered by the small intestine. 



The superior mesenteric vessels, after passing forward through the pancreatic notch, 

 descend in front of that portion of the head (processus uncinatus) which runs to the left 

 along the third part of the duodenum. The superior pancreatico- duodenal vessels run 

 downwards, and break up on the front of the head (Fig. 946). 



The neck (Fig. 946) is a comparatively attenuated portion of the gland which lies 

 in front of the portal vein, and connects the head to the body. Springing from the upper 

 portion of the head, it runs forwards, upwards, and to the left for about 1 inch (25 mm.), 

 and then passes into the body. 



The neck is about f inch (18 mm.) in width, and less than | inch (12*5 mm.) in thickness. In 

 front and to its right lie the first part of the duodenum and the pylorus ; behind and to the left it 

 rests upon the beginning of the portal vein, which is formed under cover of its lower border by the 

 union of the splenic and superior mesenteric veins. It has a partial covering of peritoneum on its 

 anterior surface ; and its beginning is generally marked off from the head by the gastro-duodenal 

 artery, with its continuation the superior pancreatico-duodenal, which lies in a groove of the 

 gland substance between the head and neck. 



77 a 



