THE VASCULAR SYSTEM 



381 



Int Jugular 

 (Ant. Cardinal 



lit Jugular 



Subclovian 



Fiost Cardinal 

 Supracardinol 



5ubcardinal 

 Anastomosis 



Supracerdina 



Ext Iliac 

 Int. Iliac. 



Gonadial- 



'Int Jugular 

 -Ext. Jugular 



left 

 Subclavian 



Coronari^ 

 5inu5 



Int. Iliac 



(Fig. 320.) 

 5-6 mm. pig embryos; D, Arrangement of veins in 6-7 mm. pig embryos; E, Cross sec- 

 tion (at level of arrow in D) showing dorso- ventral relations of vessels; F, Veins in 

 12-13 mm. embryos; G, Veins in 16-19 mm. embryos; H, Veins in 22-24 mm. embryos; 

 /, veins in 30-35 mm. embryos; J, Cross section of 17 mm. embryo at level of arrow in 

 G; K, Plan of veins in adult pig. (From Patten's "Embryology of the Pig," after 

 Butler.) 



