ANGIOLOGY 



229 



The ischiadic artery (Fig. 69, No. 9) forms the main artery of the 

 posterior extremity. This artery, the largest vessel of that region, 

 is given off from the posterior aorta and passes ventrally over and 



Fig. 66. — Blood-vessels and nerves of the posterior extremity. Outside view. 

 i. Anterior tibial artery. 2, Metatarsal artery. 3, Digital arteries. 4, Vena 

 cutaneous crurus. 5, Ischiadic artery. 6, Vena cruralis. 7, Lateral cutaneous 

 branch of the ischiadic nerve. 



between two of the main lobes of the kidney. The continuation 

 of the posterior aorta is called the sacralis media' (Fig. 64, 

 No. 32). The ischiadic artery gives off a recurrent renalis on the 



Fig. 67. — Blood-vessels and nerves of the fore limb. Outside view, i. 

 Median nerve. 3, Ulnar nerve. 4, Radial artery. 5, Recurrent ulnaris artery. 

 6, Twigs of ulnar artery to wing feathers. 



posterior lobe of the kidney (Fig. 64, No. 33). On the left side it 

 gives off a branch to the oviduct and to the hgament of the oviduct. 

 The main trunk leaves the cavity with the ischiadic nerve (Fig. 65, 



