1650 



HUMAN ANATOMY. 



The Mesentery and Topography of the Jejuno-Ileum. Since consid- 

 eration of the mesentery is indispensable for the study of the disposition of the folds 

 and relations of the small intestine, this structure next claims attention. The serous 

 covering of the gut itself requires no further description than to note that it com- 

 pletely surrounds the bowel, except at the double line of its attachment, where there 

 is left space just large enough for the passage of the vessels and nerves. The attached 

 border of the mesentery (Fig. 1399) extends from the left of the front of the first 



FIG. 1403. 



Right lung 



Diaphragm (cut) 



Hepatic vein X 



Behind Spigelian J 

 lobe 



Right 



suprarenal body 

 Probe in foramen 

 of Winslow 



Right kidney 



Beginning. 

 of duoilrnum 



Left end of, 

 transverse colon 

 Duodenu 



Jejunum 



Ascending colon 



lieu in 



Left lung 



CEsophagus 



pleen 



ft suprarenal body 

 I Left kidney 



Left end of colon 



Duodeno-jejunal 

 flexure 



Jejunum 



. . Descend ing 

 colon 



Ileum 



1 flexure 



Formalin subject; liver, stomach, transverse mesocolon, and colon have Urn removed, leaving other abdominal 

 organs in situ ; attachment of cut peritoneum indicated 1>\ white line. 



or second lumbar vertebra, immediately below the end of the- duodenum, where the 

 superior me^enteric artery enters it, to the right sarro -iliac joint, a distance of about 

 is cm. if. in. ). The relations of the upper part of the fold are determined by the 

 shape and position of the duodenum. Probably the usual course of the mesenteric 

 attachment i- from the front of the aorta downward on the fourth part of the duo- 

 denum, across the vena cava to the right sacro-iliac joint. With a V-shaped duo- 



