THE VASCULAR SYSTEM 27 



145. one to four lumbar arteries to the body wall, 



146. the posterior mesenteric artery to the rectum. 



147. At its posterior end the dorsal aorta divides into two 

 iliac arteries. Each gives off 



148. a hypogastric artery to the urinary bladder and 

 body wall, and 



149. a femoral artery to the thigh, and then continues 

 down the leg as 



150. the sciatic artery. Trace its branches if time 

 permits. 



Drawing 11. Sketch the arteries you have identified. 



Drawings 12 and 13. Assemble the sketches you have 

 made of the arteries, veins, and heart (Drawings 5, 6, 

 9, 10, and 11). Prepare from these two diagrams, one 

 to show the arterial circulation, the other to show the 

 venous circulation. 



y 1^ 



