THE NASAL CAVITY 



22? 



of the vibrissae and the secreting portions of the sebaceous glands. 

 By its deeper surface the tunica propria is closely attached to the 

 perichondrium of those plates of hyaline cartilage which form the 

 septum and alas of the nose. 



The RESPIRATORY PORTION of the nasal mucous membrane 

 (Schneiderian membrane) clothes the middle and inferior meatus 

 of the nose. It is continuous anteriorly with the mucous membrane 

 of the vestibule, above with the olfactory mucous membrane, and 

 posteriorly with that of the naso-pharynx. The respiratory region 

 is lined by columnar ciliated epithelium of the pseudo-stratified 

 type, which also contains many mucus secreting, goblet cells. 



FIG. 193. FROM A SECTION OF THE MUCOUS MEMBRANE OF THE RESPIRATORY REGION 



OF THE HUMAN NOSE. 

 o-, ciliated epithelium ; ft, ft, secreting glands ; c, blood vessel. Henmtein and Congo 



red. Photo, x 185. 



The epithelium rests upon a distinct basement membrane 

 which reacts to the specific stains for elastic tissue. The tunica 

 propria consists of a very vascular connective tissue ; it varies 

 much in thickness in different portions. It is thinnest in the 



