344 



COMMON CAROTID ARTERIES. 



Fig. 255. 



Fig. 255. DISSECTION OF THE RIGHT SIDE OP THE NECK TO SHOW THE MUSCULAR 

 TRIANGLES, THE CAROTID AND SUBCLAVIAN ARTERIES, &o. (from R. Quaiu). 



a, angle of the jaw and masseter muscle ; 6, parotid gland ; + , the posterior belly of 

 the digastric muscle ; c, submaxillary gland ; d, upon the mylohyoid muscle below the 

 anterior belly of the digastric muscle, and above the front of the hyoid bone ; e, upper 

 belly of the omohyoid muscle; e', lower belly; /, sterno-hyoid muscle; g, sterno- 

 thyroid ; 1, upon the sterno-mastoid muscle, points by a line to tbe upper part of the 

 common carotid artery ; 2, upon the scalenus anticus muscle, points to the third part of 

 subclavian artery ; 3, upon the scalenus medius, points to the superficial transverse cervical 

 artery crossing the axillary nerves ; 4, points to the posterior scapular artery, passing 

 under the levator scapulse muscle ; 5, placed upon the clavicle, points to the supra- 

 scapular artery ; 6, external carotid artery; 6', internal carotid artery ; 7, upon the thyro- 

 hyoid muscle, points to the superior thyroid artery giving superiorly its hyoid branch; 

 8, is placed upon the byo-glossus muscle within the arch of the lingual artery ; 9, placed 

 on the stylo-hyoid muscle, indicates the facial artery ; 10, origin of the occipital artery, 

 from the root of which the small sterno-mastoid artery is given off; between the occipital 

 and the facial arteries, +, upon the posterior belly of the digastric muscle, points to tbe 

 continuation of the external carotid artery before entering the parotid gland. 



The absence of branches from the trunk of the common carotid is connected with 



