738 



CIRCULATORY SYSTEM OF THE PIG 



Six pairs of lumbar arteries arise from tlie aorta. The seventii comes from 

 the middle sacral. 



The terminal branches of the aorta resemble those of the ox. 



The arteries of the shoulder, arm, and forearm resemble in general those of 

 the ox. 



The brachial artery is continued over the medial surface of the elbow by the 

 median artery. The latter divides near the middle of the forearm into radial and 

 ulnar arteries. 



The radial artery is the smaller of the two terminal branches of the median. 

 It descends along the medial border of the radius and divides at the proximal end 



Fig. 607. — Ahteries of Distal P.^rt op Right Fore 

 Limb OF Pig; Dorsal A'iew. 

 a. Terminal part of volar interosseous artery; b, 

 dorsal interosseous arterj^; c, rete carpi dorsale; d, dorsal 

 metacarpal arteries; e, dorsal common digital arteries; 

 /, dorsal proper digital arteries. 



Fig. 608. — Arteries of Distal Paht op Right Fobe 

 Limb op Pig; Volar View. 

 g. Ulnar artery; h, superficial branch of radial 

 artery; i, collateral ulnar arteryft j, volar interosseous ar- 

 tery; h, deep branch of radial artery; k, deep volar meta- 

 carpal arteries; I, superficial volar metacarpal arteries; 

 m, volar common digital artery; n, volar proper digital 

 arteries. 



of the metacarpus into two branches. The superficial branch descends in the space 

 between the second and third metacarpal bones and unites with the ulnar artery 

 or with the lateral superficial volar metacarpal artery to form the superficial volar 

 arch. The deep branch joins the volar interosseous artery at the proximal end of 

 the metacarpus to form the deep volar arch. There is also a communicating branch 

 between the radial and ulnar arteries at the carpus. 



The ulnar artery descends along the medial side of the deep digital flexor and 

 connects with the superficial branch of the radial artery to form the superficial 

 volar arch. 



