298 SURGICAL APPLIED ANATOMY. [Chap. xvn. 



haemorrhage takes place in the abdomen on the right 

 side of the mesentery, the blood is conducted into the 

 right iliac fossa, when on the left side into the pelvis. 

 This may explain the circumstance that collections of 

 blood are more common in the right than in the 

 left iliac fossa. Slits and holes are sometimes found 

 in the mesentery through which intestine has been 

 strangulated. Some of these apertures are apparently 

 congenital, while others are due to injury. If from 

 accident or from congenital defect a hole be formed 

 in one of the layers of the mesentery, it is possible 

 for a coil of the neighbouring small intestine to 

 find its way through that hole and occupy the retro- 

 peritoneal tissue between and behind the layers of the 

 mesentery. In this way is produced the " mesenteric 

 hernia " of Astley Cooper, who figures a case where 

 the whole of the small intestine was lost to view, it 

 having disappeared between the layers of the mesen- 

 tery. A like condition may be met with in the meso- 

 colon, and the whole of the small bowel has been 

 found to have passed through an aperture in one 

 layer of the meso-colon, to have occupied the retro- 

 peritoneal tissue, and to have entirely hidden itself 

 within a sac formed from the meso-colon. This con- 

 dition was named by Cooper " meso-colic hernia." 

 Hernise have also been described as occurring through 

 the foramen of Winslow. 



THE STOMACH. 



Above. 

 Liver, small omentum, diaphragm. 



In front. Behind. 



(From left to right) Transverse rneso-colon, 



diaphragm, abdominal Sktrfim*>l pancreas, crura, solar 

 wall, liver. plexus, great vessels, 



spleen, left kidney, and 

 capsule. 



Below. 

 Great omentum, transverse colon, gastro- splenic oinentuni. 



