DISSECTION OF THE HEAD AND NECK. 



201 



its entire length by a median raphe, and is crossed from side to side by 

 from eighteen to twenty curved ridges. The concavity of the ridges is 

 directed upwards (towards the root of the tongue). The ridges are 

 sharpest and the interspaces are narrowest at the upper part of the 

 palate. A layer of connective-tissue with numerous veins connects the 

 mucous membrane to the periosteum of the bones forming the basis of 

 the palate. 



Fio. 21. 



Haed Palate • 1 Palato-labitd artery of right side ; 2. Inosculation of right and left arteries, 

 forming a single labial artery which passes forwards through incisor foramen ; 3. Bar of carti- 

 lage under which palato-lahial artery runs. 



The Palato-labial Abtbrt. This vessel passes along the side of the 

 hard palate, resting in a groove on the bone, close to the alveoli. An 

 incision should be made down to the artery in this position, and it should 

 be followed backwards and forwards. It is accompanied by a satellite 

 vein and nerve. The vessel is the continuation of the internal maxillary 

 artery. Beginning at the maxillary hiatus, it reaches the upper extremity 



