11 OS 



XI'L \NCHNOLOGY 



and liver, ;m<l (lie falciform and coronary ligaments between the liver and the 

 abdominal wall and diaphragm ( Kiij. !)S!)j. 



The Rectum and Anal Canal. The hind-^ut is at first prolonged backward into 

 the body-stalk as the tube of the allantois; but, with the growth and flexure of the 



Small 



inli-sthif 



Vitelline duct 



lie.ct.wn 



A B 



Fio. 087. Diagrams to illustrate two stages in the development of the digestive tube .<nut its mesentery. 

 Tho arrow indicates the entrance In tin- Imrsa mneiitiilis. 



Ventral ,//M 



mesogastrium 



Fio. '.i. vs. I iu:il disposition of the 

 intestines und their vuscular relations. 

 (Jonnesco.) A. Aorta. // Hepatic 

 rtery. Al, Col. Branches of superior 

 meaentorio artery, m, m'. Hranches 

 of inferior meaenterio artery. S. 

 Splenic artery. 



Liver 



Umbilical vei 



Border of 



ventral 

 mesogastrium 



Bursa 

 omentalis 



Pancreas 



Dorsal 



mesogaxtriitm 



Duodenum 



(footer 



amentum 

 Transverse 

 mttocolon 



Fio. 980. Schematic figure of the bursa omentalis, etc. Human 

 embryo of eight weeks. (Kollmann.) 



tail-end of the embryo, the body-stalk, with its contained allantoic tube, is carried 

 forward to the ventral aspect of the body, and consequently a bend is formed at the 



