574 



. 



ARTERIES OF THE HUMAN 

 FORE-ARM. 



1, Lower part of biceps; 2, 

 Inner coudyle of humerus ; 

 :'. Deep portion of pronat or 

 radii teres; 4, Supinator 

 longus; 5, Flexor longus 

 pnllicis; 6, Pronator quad- 

 ratns ; 7, Flexor proiundus 

 digitoruin ; 8, Flexor carpi 

 ulnaris ; 9, Annular liga- 

 ment ; 10, Brachial artery ; 

 11, Anastomotica longus 

 magna, inosculating above 

 with the inferior profuuda, 

 and below with the anterior 

 tilnar recurrent ; 12, Radial 

 artery ; !', Radial recurrent 

 inosculating with the supe- 

 rior prnfiinda ; 11, .Siiprr- 

 ficialis vol.-c ; 15, Ulnar ar- 

 t<TV : 1'!, Superficial ]ialin:ir 

 arch, giving off digital 

 branches to three fingers 

 and a half; 17, Magna 

 pollicis and radialis indicis ; 

 20, Posterior intcrosseous. 



v///: AETEBIB8. 



four hrandie.- tin- )nil,iinr or r,.ll,il, nil /" tin ili- 

 Tin-so arc at first situated Kitwivn the perforates ami 

 pcrforans tendons, ami n adi tin- sii|M-rior extremity of 

 tlic inti-rdigital spares, wlii-rr they re.-ei\i- tin- niet;i'-arpal 

 intero.ssoous arteries and e >m]>it tin HIM hvs in tin- fol- 

 lowing maiuirr: tin- tiitn-mil goes to tin- tliiiinli; the 



M <niil counting from within outwards gains tin- i - 



centric side of the index; tin- third, tin- largest, divides 

 into two branches which lie alongside the great digits; 

 the last goes to the external digit. 



COMPARISON OF THE AXILLARY ARTKRIES IN MAN WITH 

 THOSE OF ANIMALS. 



The arteries of the thoracic limbs and head ai i.-> 

 rately from the arch of the aorta; consequently, in Man 

 then- is no anterior aorta. 



The vessel of the limb that represents the axilhin f 

 animals is here resolved into two portions: the snli-lni-i<ni 

 artery and axillary arlery. 



The SUBCLAVIAN ARTERY has not the same origin on 

 both sides; on the right it arises from the aorta by a trunk 

 common to it and the carotid of that side the lirifh!- 

 rr/il/filic trunk (arteria innominata); while the left is 

 detached separattly from the most distant part of 1 1n- 

 aortic arch. The subclavian vessels extend to the in- 

 ferior border of the clavicle.-", and furni.-h seven imjtoitant 

 eol lateral branches, which are present in the domesticat '1 

 animals. They are : 



1. The vertelrral (trlu-ij. situated in the v rfeliral fora- 

 mina of tho cervical vertebra), as far as the a\i>; then- it 

 anastomoses, as in Solipeds, with a branch of the carotid, 

 niters the spinal canal by the foramen magnum, and 

 unites with its follow at the lower border of tli< JH.HH 

 Varolii to form the basilar artery which, in the Horse, 

 comes from the cerebro-spinnl artery of the occipital. 



2. The inferior thyroid, whose origin and some branches 

 we find in the ascending branch (ascending cervical) of 

 the inferior cervical artery in the Horse. 



3. The internal mammary artery divides into two 

 branches at the xiphoid appendix of the sternum. 



4. The superior intercostal artery, whoso analogue wo 

 see in Solipeds, in the subcostal branch of the dorsal. 



5. The superscapular artery, present in all animals 

 and disposed iii tlie game manner. 



G. The transverse cerviml (Inmtrtrfa colli), n pi. 

 by the extra-thoracic branches of the dorsal artery. 



7. The deep cervical (cervical in profinnln) corn-.-jMind.s 

 to the superior cervical in the Horse. 



The AXILLARY ARTERV, or cxtia-thoracic portion of the 

 subclavinn trunk, extends to the external holder of the 

 pectoral mnscle, where it is continued by the humeral 

 artery. The axillary give.-- oil': tin- lln>ri-ii;i <ti-r,i,;,il!*, 

 resembling the descending branch of the inferior cervical 

 artery of large i|iindrnpeds ; the <-.rtrr>inl niiiiinniin/ ; *nh- 

 tmpular ; ami //"-/<//-. and anterior circumflex, branches 

 of tho preceding in SolijK-ds. 



HUMKKAL (IJitAciitAi.) AitTKiiY. This artery cxti nds 

 In. m tin- i-xteinal l,.irdir of tin- pectoral muscle to tho 

 l>cnd of the elbow; hero it divides into 'two t rminal 

 branches the ulnar and radial. 



In its course it givts (iff several muscular brand us, 



18, Posterior ulnar recurrent ; lt>, Anterior interosseous; 



