SUGGESTIONS FOR LABORATORY WORK 611 



the liver upward, and near the lesser curvature of the stomach 

 this vessel will be seen. The third and largest is the splenic. 



Superior Mesenteric. Turn the stomach and intestines to the 

 right. The artery rises from the aorta just below the celiac axis. 

 It has an extensive distribution to the coils of the small intestine. 



Renal Arteries. Rise from the sides of the aorta and enter the 

 hilum of the kidneys. 



Inferior Mesenteric. It arises from the abdominal aorta about 

 opposite the iliac crest, and has two large branches which supply 

 the large intestine. 



ARTERIES OP THE LOWER EXTREMITY 



Just before leaving the abdomen the aorta sends off four 

 branches, two external iliacs and two .internal iliacs, and then it 

 becomes the caudal. 



External Iliac. This passes downward a short distance and be- 

 comes the femoral artery, it runs down the leg as the femoral, and 

 behind the knee it becomes the popliteal, which divides into the 

 anterior and posterior tibial. The anterior tibial becomes the 

 dorsalis pedis on the upper surface of the foot. 



Internal Iliac. This arises from the aorta just below the origin 

 of the preceding and passes obliquely downward into the pelvis, 

 and supplies the organs of the pelvis with the following branches: 

 vesical to bladder, internal pubic to internal genital organs, external 

 pubic to external genital organs, sciatic, with gluteal branch, to 

 muscles of back of pelvis, hip, and thigh. 



Caudal Artery. A continuation of the aorta to the tail. 



ARTERIES OF THE HEAD AND UPPER EXTREMITIES 



Carotid Arteries. These arise from the innominate artery, a 

 short distance above the arch of the aorta, and pass upward on 

 either side of the trachea, supplying the neck and head. Follow 

 one of these arteries forward, noting its branches. 



Subclavian Arteries. The right subclavian is a continuation of 

 the innominate. The left arises from the arch of the aorta. They 

 supply the upper extremities. Follow the artery down one arm, 

 note the vertebral, a branch running up the foramina in the trans- 

 verse processes of the cervical vertebrae to the brain. The sub- 



