140 



THORACIC AORTA. 



Dorsalis carpi, arising from the radial, is distributed upon the back 

 of the wrist beneath the extensor tendons. 



Magna pollicis, one of the terminating branches of the radial, 

 supplying the thumb. 



Radialis indicis,^'^ arises in connexion with the last, and is distri- 

 buted upon the radial side of the forefinger. 



Falmaris profunda, another terminating branch, which passes 

 between the flexor tendons and bones of the metacarpus, to join the 

 cubitalis manus of the ulnar. 



ULNAR. 



It passes^^ under the bellies of several muscles arising from the in- 

 ternal condyle, and descends the inner side of the arm, between the 

 tendons of the flexor carpi ulnaris and flexor sublimis muscles ; then 

 passes over the annular ligament of the wrist, to form the super- 

 ficial arch. (Fig. 121.) 



Ulnar recurre?it,^^ arises from the ulnar near its commencement, 

 and winding under the internal condyle, anastomoses with the anas- 

 tomotic. 



Interosseous, arises from the ulnar opposite the tubercle of the 

 radius, and divides into an anterior and posterior branch, the anterior 

 interosseous descending to the wrist in front of the interosseous liga- 

 ment ; the posterior perforating the ligament, is distributed to the ex- 

 tensor muscles of the arm. 



Dorsalis manus, arises from the ulnar, and is distributed upon the 

 back of the hand. 



Superficial arch,^^ is a continuation of the radial artery, immedi- 

 ately beneath the palmar fascia. 



Cubitalis manus profunda, a branch of the ulnar, arising near 

 the superficial arch ; it joins the deep arch. 



Digital arteries. — These are three in number, which divide into 

 the digito-radial and digito-ulnar, for each side of the finger. The 

 ulnar side of the little finger is supplied by a distinct branch from 

 the superficial arch. 



THORACIC AORTA. 



Bronchial,^^ vary in size and origin; sometimes arising by a com- 

 mon trunk; they enter the root of each lung, and supply its parenchy- 

 matous structure, glands, &c. (Fig. 115.) 



JEsophageal,^ are from four to six in number, arising from the 

 anterior convexity of the aorta, to be distributed to the oesophagus. 



Intercostal.^'^ — These are ten in number on each side, arising from 

 the posterior convexity of the aorta. 



They supply the ten inferior intercostal spaces, the right being 



