THE CIRCULATORY SYSTEM 



168 



the coronary) the two bronchial, which go to the lungs; 

 the three or four esophageal, for the coats of the esopha- 

 gus; the pericardial, for the pericardium; and numerous 

 intercostal arteries. 



Within the abdomen arise the phrenic, in the dia- 

 phragm ; the coeliac axis, with three branches, the 

 hepatic, going mainly to the liver, the gastric, to the stom- 

 ach, and the splenic to the spleen (Fig. 94) ; the superior 



R. Phrenic Artery 

 /Abdominal 



/ Aorta 

 ' ,CcKliac Axis 

 ' /Gastric Artery 



/Splenic Artery 



Hepatic Artery 



Fig. 94. The coeliac axis and its branches. 



and inferior mesenteric, which supply the intestine ; and 

 the renal, going to the kidneys. 



The iliac arteries supply the walls and organs of the 

 pelvis and the legs. The artery on the front and inner 

 side of the thigh is called the femoral; above the knee 

 joint it passes to the back side of the leg, and is there 

 called the popliteal, while below the knee the main 

 branches are the tibial and the peroneal, which unite in 



