Olfactorymucosa--Location:are located in the superior conchaewhich located in the roof of the nasal cavity--in humans ,it about 10cm? in area and up to100mm in thickness--it is lined by olfactory epithelium which servesas a chemoreceptor for the sense of smell6
Olfactory mucosa -Location:are located in the superior conchae which located in the roof of the nasal cavity -in humans ,it about 10cm² in area and up to 100mm in thickness -it is lined by olfactory epithelium which serves as a chemoreceptor for the sense of smell 6
OlfactorymucosaA.olfactory epitheliumSupportingcell一--it is a pseudostratifiedcolumnarepitheliumOlfactorycell一--composed of 3 cell types:supportingcellsBasalcell②basalcellsolfactorycellsBowman'sglandAxons
Olfactory mucosa A. olfactory epithelium -it is a pseudostratified columnar epithelium -composed of 3 cell types: ①supporting cells ②basal cells ③olfactory cells 7
Olfactorycilia①supportingcellsOlfactoryvesicle--have broad,cylindrical apexesandnarrowerbases-ontheirfree surface are-Supportingmicrovillicell--well-developedjunctionalOlfactorycomplexescell-cantain a light yellow pigment-Axonthat is responsible for the coloroftheolfactorymucosaShwanncell8
① supporting cells -have broad ,cylindrical apexes and narrower bases -on their free surface are microvilli -well-developed junctional complexes -cantain a light yellow pigment that is responsible for the color of the olfactory mucosa Olfactory vesicle Olfactory cilia Supporting cell Olfactory cell Axon Shwann cell 8
basal cellsSupportingcell-- are smallercellsOlfactory2--They are spherical or cone-cell日shaped and form a singlelayer at the base of theBasalcellepithelium--They are relativelyundifferentiatedcellsBowman's gland-Axons
② basal cells - are smaller cells -They are spherical or cone- shaped and form a single layer at the base of the epithelium -They are relatively undifferentiated cells 9
Olfactory③olfactorycellscilia--Theyare bipolarneuronsOlfactory-Their nuclei liebelowthenuclei ofvesiclesupportingcells--The apical dendrites are slender andterminateinsmallbulbousenlargementscalled olfactory vesicles,fromwhichSupportingcellarise cilia--These cilia are very long and parallel toOlfactorythe epithelial surfacecell-- These cilia are nonmotile and respondAxonto odoriferous substances--theiraxonsunite insmall bundlestoformthefascicles oftheolfactorynerveShwanncell10
③ olfactory cells -They are bipolar neurons -Their nuclei lie below the nuclei of supporting cells -The apical dendrites are slender and terminate in small bulbous enlargements called olfactory vesicles, from which arise cilia -These cilia are very long and parallel to the epithelial surface - These cilia are nonmotile and respond to odoriferous substances -their axons unite in small bundles to form the fascicles of the olfactory nerve Olfactory vesicle Olfactory cilia Supporting cell Olfactory cell Axon Shwann cell 10