418 



COMPARATIVE ANATOMY 



V 



FIG. 3-23. THE ARTERIAL SYSTEM OF Emys europrea. Fiom the ventral side. 



Ac, dorsal aorta ; Ap, pulmonary ; Br, Br, the two bronchi ; C, caudal aorta ; 

 (.'', common carotids, with tracheal and cesophageal branches (Tr, Oe) ; 

 Co, Co 1 , and Me, eoeliaco-mesenteric, which here arises as a bundle of 

 separate vessels ; Or, femoral ; d, d, small intestine ; E, epigastric ; e, large 

 intestine ;/s, sciatic ; in, stomach : MB, posterior mesenteric ; RA, aortic 

 arches ; Sc, subclavian ; Tr, trachea ; UG, urinogenital arteries ; Ver, 

 vertebral. 



