Pseudostratified columnar epithelium: Difference between revisions

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Source: Candid ICSE Biology Class 9. It is my humble request to LOL Alivardi to Please not revert it.
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Reverted 2 edits by Sarika9140 (talk): Unclear what mischeif you are up to here so reverting
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| Precursor =
| System =
| Function = Protective[[Epithelium]]
}}
{{Epithelia series}}
[[File:Psuedostratified epithelium animated.gif|alt=pseudostratified epithelium|thumb|Pseudostratified columnar epithelium, animated image highlights the epithelial cells, goblet cells, then underlying connective tissue]]
A '''pseudostratified epithelium''' is a type of [[epithelium]] that contains two types of cells, i.e.,though longcomprising pillar-likeonly anda smallsingle triangular.layer Theof pillar like[[Cell (biology)|cells are broad on free surface and narrow down towards the basement membrane In between the narrow ends are present the small triangular cells. Hence]], it seems to be two-layered but is actually single-layered.has Itsits [[cell nucleus|cell nuclei]] is positioned in a manner suggestive of [[stratified columnar epithelia|stratified epithelia]]. As it rarely occurs as [[squamous epithelium|squamous]] or [[cuboidal epithelia]], it is usually considered synonymous with the term '''pseudostratified columnar epithelium'''.
rarely occurs as [[squamous epithelium|squamous]] or [[cuboidal epithelia]], it is usually considered synonymous with the term '''pseudostratified columnar epithelium'''.
 
The term ''pseudostratified'' is derived from the appearance of this epithelium in section which conveys the erroneous (''pseudo'' means almost or approaching) impression that there is more than one layer of cells, when in fact this is a true simple epithelium since all the cells rest on the [[basement membrane]]. The nuclei of these cells, however, are disposed at different levels, thus creating the illusion of cellular stratification. Not all ciliated cells extend to the luminal surface; such cells are capable of cell division providing replacements for cells lost or damaged.