i 9 8 THE POCKET ANATOMY 



layer of the lieno-renal ligament, and over the descending 

 colon to join the part already described. 



Between the liver, stomach, and transverse colon is a 

 diverticulum of the main peritoneal sac, which communicates 

 with the larger peritoneal cavity through the foramen of Win- 

 slow. To understand the disposition of the layers one has 

 only to imagine the smaller sac to have been invaginated 

 through the foramen of Winslow inwards and behind the 

 stomach, and the arrangement becomes clear. 



The two sacs traced vertically. 



From transverse fissure of liver, two layers pass : 



To small curvature of stomach. 



Two layers separate, one passing in front and the other 

 behind stomach, thus enclosing it. 



Join together at great curvature, forming anterior layers 

 of great omentum. 



Pass down in front of and beyond transverse colon. 



Bend upwards and backwards, and separate to enclose 

 transverse colon ; continue together to the posterior abdominal 

 wall, until opposite the anterior border of the pancreas, where 

 they part, one layer passing upwards, and the other down- 

 wards. 



The ascending layer passes : 



Over upper surface of pancreas and posterior part of 

 diaphragm. 



Then on to posterior surface of liver to the transverse fissure. 



The descending layer passes : 



Along superior mesenteric vessels, round jejunum and ileum, 

 and back to spine, forming mesentery. 



Downwards in front of spine, lower part of aorta and sacral 

 promontory. 



Over pelvic colon, forming pelvic meso-colon. 



Forwards. 

 Male. To bladder, forming recto-vesical pouch and 



posterior false ligaments. 



Female. To vagina and uterus, forming posterior liga- 

 ments of uterus and recto-vaginal pouch. Then over 

 uterus to bladder, forming utero-vesical pouch and 

 posterior vesical ligaments. 



Over bladder to anterior abdominal wall, covering urachus 

 and obliterated hypogastric arteries as far as umbilicus. 



Over under surface of diaphragm. 



Reflected over upper surface of liver. 



