to investigate the regional variability in arterial and venous endothelial prostacyclin ( pgi2 ) biosynthesis , we obtained 1-cm segments of carotid arteries , external jugular veins , femoral arteries and veins , iliac arteries and veins , inferior venae cavae ( ivc ) , and aortas from 17 dogs .
C1179027
venous endothelial
C0042449
veins