356 



ARTERIES OF THE HEAD AND XECK. 



COMMON CAEOTID ARTEEIES. 



POSITION A:ND IIELATIOINS — DIFFERENCE ON THE TWO SIDES, — The 



common carotid arteries of the right and left sides of the body are nearly 

 similar in their course and position whilst they are in the neck ; but 



Fig. 247. 



Fig. 2i7. — View of the Kight Common Carotid and Subclavian Arteries, with 

 THE Origin of their Branches and their Relations (R. Quain). ^ 



The stemo-mastoid, sterno-tbyroid, sterno-hyoiil, and omo-hyoid muscles Lave been 

 removed, tlie ti'apeziiis has been detached from the outer i>art of the chivicle and turned 

 I>ackwards, and the inner part of the clavicle has been removed : a, parotid gland near 

 the place where the duct of Stcnson leaves it : b, angle of the jaw and masseter muscle ; 

 r, submaxillary gland, enclosed between the digastric and stylo-hyoid muscles ; d, divided 

 upper part of the sterno-mastoid muscle ; c, front of the h\-oid bone ; /, thyroid cartilage ; 

 '/, isthmus of the thyroid gland ; /(, the trachea ; v, /', the sawn ends of the clavicle, the 

 portion lietween them having been removed ; k, the first rib ; I, front of the sternum ; 

 m, scalenus niedius ; n, levator anguli scapula? ; o, deep surface of the trapezius ; p, on 

 the longus colli muscle, pointing to the i)neumogastric nerve ; IV, the uppermost of the 

 jierves of the brachial plexus ; A, the innominate arteiy ; 1, right common carotid artery ; 



