890 



THE VASCULAE SYSTEM. 



arteries, except the terminal branches and some minute twigs from each to the correspond- 

 ing carotid sheath and glomus caroticum. 



The right common carotid artery, as already stated, differs as regards origin 

 from the left common carotid. In length and general position it corresponds with 

 the^ cervical portion of the left common carotid, and its relations also are very 

 similar. Such differences as exist may be briefly summarised as follows: The 



A. et V., temporalis superficialis - 

 A. et V auriculares posteriores . 



End of A. carotis externa -- 



A. et V., oc-cipitalis 



N. occipitalis tertius 

 Mm. digastrious et stylohyoideu 



N. oceipitalis minor 



Kami sternomastoideoe 



N. hypoglossus 



A. carotis externa 



A. carotis iuterna 



A. superftcialis colli 



Kamus commuui 



A. traiisversa colli - 



A. subclavia 

 M. serratus anterior 

 A. et V., transversa scapulae 

 A. thoracoacromia" 



ramus acromi 

 M. deltoideus . 

 A. thoraco- -^. M 



aeromialis, ramus 

 deltoideus 



A. et V, supraorbitalix 

 . A. et V., frontalis 



A. angula 



A. labialis superior 



A. labialis inferior 

 A. maxillaris externa 

 A. etV.,maxillaris externa 

 _ Gl. .submaxillaris 



(deep part) 

 -- A. lingualis 



A. submentalis 



. mylohyoideus 



hypoglossus, ramus thyreohyoideus 

 . laiyngeus superior, ramus interims 

 " V. facialis comimmis 

 -A. et V., thyreoidea superior 

 - A. carotis communis 

 M. sternohyoideus 

 M. omohyoideus 

 M sternohyoi<leus 

 : Gl. thyreoidea 



'" Middle thyreoid vein 



Trachea 



V. thyreoidse inferior 



;.M. sternothyreoideus 



M. sternohyoideus 



M. subclavius 



... V. cephalica 



N. thoracalis anterior 



lateralis 



L V. axillaris 



A. thoracoacromialis, 

 ramus pectoralis 



- il pectoral is major 



1 



_ 



FIG. 759. DISSECTION OF THE CAROTID, SUBCLAVIAN, AND AXILLARY ARTERIES AND THEIR BRANCHES. 



Compare with Fig. 766, which is a drawing of the same body from a different point of view. The middle 

 third of the clavicle lias been removed and the subclavius muscle is turned downwards and medially. 



internal jugular vein on both sides lies lateral to the artery ; on the left side in the 

 lower part of the neck it is also anterior to the artery, whilst on the right side the 

 vein is separated from the lateral surface of the artery, at its lower end, by a well- 

 marked interval in which the vagus nerve appears. The thoracic duct does not 

 come into relation with the right common carotid, and there is also a difference 

 in the relations of the recurrent nerves to the arteries on the two sides. On the 

 left side the nerve crosses posterior to the mediastinal part of the left artery, and 

 lies medial to its cervical part, whilst the corresponding nerve on the right side 



