120 GENERAL BIOLOGY. 



Auricles. 

 Ventricles. 

 Diagram ! 

 The Veins. 



A. The anterior venae cavae, one on each side open- 



ing into the right auricle ; formed by the 

 union of : 



1. The jugular vein, bringing back blood from 



the head and neck, receiving : 

 (a) The vertebral vein. 



2. The brachial vein, bringing blood from the 



wing. 



3. The pectoral vein, bringing blood from the 



chest muscles. 



B. The posterior vena cava, an unpaired vein, open- 



ing into the right auricle; formed by : 

 1. The two iliac veins. Each iliac vein begins 

 near the anterior end of the kidney by the 

 union of : 



(a) The femoral vein, bringing blood from the 



leg. 



(b) The hypogastric vein, passing through the 



kidney and formed in the posterior 

 abdominal region by the union of : 



(oa) The caudal vein, an unpaired vein 

 from the tail. 



(bb) The internal iliac vein from the pelvis. 



(cc) The posterior mesenteric vein (coccygeo 



