6o 



PRACTICAL ANATOMY. 



a large nest of enlarged glands here at the bifurcation. The following are the 

 branches of the external carotid artery and their attendants : 



1. The superior thyroid artery, vein, nerve, lymphatic. 



2. The lingual artery, vein, nerve, lymphatic. 



3. "\\e facial artery , vein, nerve, lymphatic. 



4. The occipital artery, vein, nerve, lymphatic. 



5. The posterior auricular artery, vein, nerve, lymphatic. 



6. The ascending pharyngeal artery, vein, nerve, lymphatic. 



7. The temporal artery, vein, nerve, lymphatic. 



8. The internal maxillary artery, vein, nerve, lymphatic. 



NOTE. It has been pointed out in a foregoing paragraph that sympathetic 

 nerves accompany every branch of the external carotid artery. Morris shows 

 that the deep lymphatics of the head and neck roughly follow the course ot 

 the deep arteries, and finally terminate in the glandular concatenatae previously 

 described. Hence in vour dissection of the branches of the external carotid, 



Falato-gloasus 



Descending palatine arteri, 

 Palato-pharyngeus 



TONSIL 



Ascending palatine branch 



of facial 

 Tonsillar branch of dorsalis 



linguae 



Tonsillar branch of facial 

 Stylo-glossuB - 



Dorsalis lingua artery 



Middle constrictor 

 HYPOGLOSSAL NERVE 



Facial artery 



Posterior belly of digastric 

 and stylo-hyoid 

 Supra-hyoid branch 



SUP. LARYNGEAL K. 



Infra-hyoid branch 



Internal carotid artery 



Ronnie artery 



Q-enio-hyoid 

 Anterior belly 

 of digastric 



ur /rry 

 Superior thyroid artery 



External carotid artery 

 Common carotid arlrry 



FlG. 32. SCH KM K OK TI1K LlNCJUAI. ARTKRY. 



,,: 



you will remember you can always find the vein corresponding to the artc 

 the sympathetics may be found by treating the artery with ether and formaline ; 

 the lymphatic glands can only be demonstrated when enlarged by disease. As t<> 

 the lymphatic, I would urgently request the student to study carefully t 

 schematic drawings of these vessels by Professor F. R. Sherwood, in Mor 

 " Anatomy." 



Caution. Never use a cutting instrument in dissecting arteries. The fore 

 or dissecting hook is all you need to divide the connective tissue. Handle veins 

 with gentle touch ; they are very easily ruptured. 



Specific ] Dissection. The lingual artery: (i) find this vessel above the 

 greater horn of the hyoid bone ; (2) a little below, and running parallel with, the 

 hypoglossal nerve ; (3) passing behind the free margin of the hyo-glossus muscle 

 to the tongue. (Fig. 32.) 



The Superior Thyroid Artery. (i) It is the first branch given off by the 

 external carotid ; (2) it goes to the upper part of the thyroid gland ; (3) it gives 

 off the superior laryngeal branch, which always accompanies the superior laryn- 



