390 NERVOUS SYSTEM. 



The skin which covers the upper half of the nose is loosely 

 attached, by cellular substance, to the subjacent parts, but it 

 adheres very closely to the surface of the cartilaginous and li- 

 gamentous structure, and is abundantly furnished with seba-- 

 ceous glands and follicles. The exterior orifices of the latter 

 are apparent, and are often filled with their appropriate fluid in 

 an inspissated state, which, when forced out by pressure, as- 

 sumes the form of small worms, the blackness of the end of 

 which is only dirt. 



There are several muscles destined to move the cartilaginous 

 structure of the nose ; and which have been described among 

 those belonging to the face. They are, 



The Levator Labii Superioris Akeque Nasi, which lies upon 

 the side of the nose and comes from the superior part of the 

 nasal process and body of the upper maxillary bone, is, besides 

 its insertion into the upper lip, connected with the ala nasi, and 

 will draw the latter upwards: 



The Compressor Naris, arising from the ala nasi by a small 

 pointed beginning, is spread out upon the upper edge of the 

 oval cartilage and upon the triangular plate of the cartilaginous 

 septum, so as to cover it, and is inserted into its fellow on the 

 middle line : 



The Depressor Labii Superioris Ateque Nasi, by arising from 

 the roots of the alveolar processes of the incisor and canine 

 teeth of the upper jaw, and going to be inserted into the ala 

 nasi, as well as into the upper lip, will draw the ala nasi down- 

 wards :- 



The Nasalis Labii Superioris, or Depressor Narium, which 

 is the pointed production from the orbicularis oris, going into 

 the colnmna nasi, and will draw the latter downwards and 

 backwards. 



The Mucous Membrane of the Nose (Membrana Pituitaria y 

 Schneideriana) lines the whole of each side of the nose, pene- 

 trates into the several sinuses and cavities communicating with 

 it, and is continuous, at the orifice of the nostrils, with the 

 skin, and at the posterior nares, with the mucous membrane* of 

 the pharynx. 



It is not of essential importance to trace its course from any 

 particular point, but for the sake of perspicuity, we may begin 



