428 



BLOOD-VESSELS OF THE HEAD. 



SECTION IV. 



% 

 BLOOD-VESSELS OF THE HEAD IN THEIR NUMERICAL ORDER. 



The external and internal carotid, and vertebral arteries, 

 are the great sources which supply the head with blood. 



FIG. 120. The external and in- 



ternal carotids arise from 

 the common carotids in 

 the neck, opposite to the 

 space between the os-hy- 

 oides and the thyroid 

 cartilage. The external 

 carotid ascends from this 

 origin to the neck of the 

 lower jaw,adjacent to the 

 meatus auditorius exter- 

 nus. It is crossed near its 

 origin by the lingual 

 nerve; also by the di- 

 gastric and stylo-hyoid 

 muscles, and is covered in 

 front by the platysma, 

 and superficial fascia. 

 Its upper extremity is imbedded in the substance of the 

 parotid gland. It gives off the following branches : 



SUPERIOR THYROID. 

 LINGUAL. 



Hyoid. 



Dorsalis linguae. 

 Sublingual. 



Ranine, which is the continued trunk 

 of lingual. 



FACIAL. 



Inferior palatine. 

 Submaxillary. 

 Sub-mental. 

 Inferior labial. 

 Inferior coronary. 

 Superior coronary. 



FIG. 120 represents the branches of the External Corotid Artery, a Arte- 

 ria-innominata. 6 Common carotid, c Bifurcation of common carotid, d 

 External carotid, e Internal carotid artery. / Superior thyroid, g- Lingual. 

 h i Facial, j Submental. fc Continuation of facial. I m Inferior and supe- 

 rior coronary arteries, n Nasal or angular branch, o External carotid con- 

 tinued, p Internal maxillary, q Temporal, r Posterior auricular, s Occip- 

 ital arjery. 



