ARTERIAL SYSTEM 



321 



FIG. 263. THE ARTERIAL SYSTEM OF Emys europwa. 



Tr, trachea ; Br, Br, the two bronchi ; m, stomach ; d, d, small intestine ; e, 

 large intestine ; Ap, pulmonary artery ; Cac, common carotids, with 

 tracheal and oesophageal branches (Tr, Oe);Sc, subclavian artery; Ver, vertebral 

 artery ; RA, roots of the aorta ; Ao, dorsal aorta ; Co, Co 1 , and Me, coeliaco- 

 mesenteric artery, which here arises as a bundle of separate vessels ; UG, 

 urinogenital arteries ; Cr, crural artery ; E, epigastric artery ; Is, sciatic 

 artery ; MB, posterior mesenteric arteries ; C, caudal aorta. 



Y 



