288 



ESSENTIALS OF ZOOLOGY 



Phrenic arteries are yielded to the diaphragm just after the 

 vessel has passed through it, and the aorta proceeds onwards 

 along the dorsal wall of the abdomen in the upper part of the 

 mesenteric folds of the peritoneum. It sends off important 

 vessels along the mesentery to supply the alimentary canal 

 and its appendages. The first of these is the coeliac, and it 



Ext . jugular 

 Int. jugular 



Subclavian v. 



Subclavian a. 



Right ant. vena cava 



Pulmonary a. 



Ant. intercostal v. 



Azygos 



Post, vena cava 



Portal v.. 



Hepatic v. 

 Hematic a. 



Gastric a. 



Gastric v. 



Post. mes. v. 



Ant. mes. v. 



Internal iliac a. it v, 

 (Hypogastric) 



Left carotid 



Vertebralia. 



Left ant. vena cava 



Pulmonary v. 

 Left auricle 

 Left ventricle 

 Intercostal a. 



Aorta 

 Phrenic a. & v. 



Sperm, (or ovar.~) a. & v. 

 Post. mes. a. 



Fia. 137. Diagram of the blood circulation of the rabbit 

 from the ventral aspect. 



divides into hepatic, gastric, splenic, pancreatic, and duodenal 

 branches. The next is the anterior mesenteric, which supplies 

 practically all the remaining part of the intestine. The third 

 is the posterior mesenteric, and it supplies the rectum. These 

 vessels are median and unpaired. Paired vessels are yielded 

 by the aorta to the kidneys renal arteries and to the 

 gonads ovarian or spermatic. Lumbar arteries supply the 

 abdominal walls. The aorta gives off large iliac arteries to 

 the hinder limbs, and terminates in a caudal artery. 



The blood carried by these arteries all over the body, and 



