128 



ESSENTIALS OF ZOOLOGY 



the left subclavian arteries. The innominate artery then divides quite 

 shortly into the right commo7i carotid and the right subclavian arter- 

 ies. The carotids supply the head and neck; the siibclavians supply 



External Ja^ulat V. 



-L . Aa\ \\ar>^ V. 

 -L Subclavian V. 

 Vcvtebral V. 



L. S up^r io r 



Vena Cava 

 -R. Atrium 



-J- \/en1:ric\e 



Inte*-*©*" Vena Ca\^<x 



-Suora»-©nal V. 

 -I. H^nal V. 



-K\<Jnev 

 Iliolumbar V 



LJntemal . . 

 Dp«rma"tCc V. 



c 



O vr>m ©'*> 



Wiac V. 



Fig. 42. — Diagram of the veins of the rat from ventral view. 



t 



Ihe shoulders and arms ; the aorta takes a mid-dorsal position and ex- 

 tends the length of the trunk and tail. It is known as the dorsal aorta 

 and from anterior to posterior it gives rise to the intercostal arteries 

 to the ribs; phrenic artery to the diaphragm; celiac artery to the 



