1026 



EMBRYOLOGY. 

 Fig. 561. 



A FCETDS OPENED ON THE LEFT SIDE TO SHOW THE COURSE OP THE UMBILICAL VESSELS 



IN THE BODY. 



.4, Umbilical conl ; B. umbilical vein; C, iiml)ilical artery; D, liladiliM ; A', testicle; F. kiliiev; 

 G, spleen; //, liver; /, intestine; J, lung; A', heirt ; L, pulmonary artery; M, ductus 

 arteriosus; iV, thymus gland. 



Fig. 562. 



BT.OOn-VKSSF.LS IV TKI'; LIVER OF AN EQUINE FtKTUS \V MID-TF.RM. 



.^ Umbilical vein; £, its anastomoses with the {.ortal vein, C; B, ductus venosus; E, poster 



rena cava. 



