The term pseudostratified is derived from the appearance of this epithelium in the 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. All cells are not of equal size and not all cells extend to the luminal/apical surface; such cells are capable of cell division providing replacements for cells lost or damaged.
Pseudostratified epithelia function in secretion or absorption. If a specimen looks stratified but has cilia, then it is a pseudostratified ciliated epithelium, since stratified epithelia do not have cilia. Ciliated epithelia are more common and lines the trachea, bronchi. Non-ciliated epithelia lines the larger ducts such as the ducts of parotid glands.
Ciliated pseudostratified columnar epithelia is the type of respiratory epithelium found in the linings of the trachea as well as other respiratory tract, which allows filtering and humidification of incoming air.[1]
Non-ciliated pseudostratified columnar epithelia are located in the prostate[2] and membranous part of male vas deferens.
Pseudostratified columnar epithelia with stereocilia are located in the epididymis. Stereocilia of the epididymis are not cilia because their cytoskeleton is composed of actin filaments, not microtubules.[3] They are structurally and molecularly more similar to microvilli than to true cilia.[dubious – discuss]
Pseudostratified columnar epithelia are found forming the straight, tubular glands of the endometrium in females.[4] They are also found in the internal part of the ear.
Additional imagesedit
Cross-section of pseudostratified columnar epithelium
Second cross-section of pseudostratified columnar epithelium
Pseudostratified columnar epithelium, animated image highlights the epithelial cells, goblet cells, then underlying connective tissue
Referencesedit
^Haschek, Wanda; Rousseaux, Colin (2012). Haschek and Rousseaux's handbook of toxicologic pathology (Second ed.). Amsterdam: Academic Press. ISBN9780124157590.
^Ross, Michael H., auteur. (27 December 2018), Histology : a text and atlas : with correlated cell and molecular biology, Wolters Kluwer Health, ISBN9781496383426, OCLC 1089540703{{citation}}: CS1 maint: multiple names: authors list (link)
^Höfer, D.; Drenckhahn, D. (1996). "Cytoskeletal differences between stereocilia of the human sperm passageway and microvilli/stereocilia in other locations". Anatomical Record. 245 (1): 57–64. doi:10.1002/(SICI)1097-0185(199605)245:1<57::AID-AR10>3.0.CO;2-8. PMID 8731041.
^Robbins, Cotran. Pathologic Basis of Disease. p. 1080.
External linksedit
April 11, 2024
pseudostratified, columnar, epithelium, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, sch. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Pseudostratified columnar epithelium news newspapers books scholar JSTOR January 2015 Learn how and when to remove this template message Pseudostratified columnar epithelium is a type of epithelium that though comprising only a single layer of cells has its cell nuclei positioned in a manner suggestive of stratified columnar epithelium A stratified epithelium rarely occurs as squamous or cuboidal Pseudostratified columnar epitheliumIllustration depicting Pseudostratified ciliated columnar epithelium DetailsFunctionEpitheliumIdentifiersTHH2 00 02 0 02021FMA45572Anatomical terms of microanatomy edit on Wikidata The term pseudostratified is derived from the appearance of this epithelium in the 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 All cells are not of equal size and not all cells extend to the luminal apical surface such cells are capable of cell division providing replacements for cells lost or damaged Pseudostratified epithelia function in secretion or absorption If a specimen looks stratified but has cilia then it is a pseudostratified ciliated epithelium since stratified epithelia do not have cilia Ciliated epithelia are more common and lines the trachea bronchi Non ciliated epithelia lines the larger ducts such as the ducts of parotid glands Contents 1 Examples 2 Additional images 3 References 4 External linksExamples editCiliated pseudostratified columnar epithelia is the type of respiratory epithelium found in the linings of the trachea as well as other respiratory tract which allows filtering and humidification of incoming air 1 Non ciliated pseudostratified columnar epithelia are located in the prostate 2 and membranous part of male vas deferens Pseudostratified columnar epithelia with stereocilia are located in the epididymis Stereocilia of the epididymis are not cilia because their cytoskeleton is composed of actin filaments not microtubules 3 They are structurally and molecularly more similar to microvilli than to true cilia dubious discuss Pseudostratified columnar epithelia are found forming the straight tubular glands of the endometrium in females 4 They are also found in the internal part of the ear Additional images edit nbsp Cross section of pseudostratified columnar epithelium nbsp Second cross section of pseudostratified columnar epithelium nbsp Pseudostratified columnar epithelium animated image highlights the epithelial cells goblet cells then underlying connective tissueReferences edit Haschek Wanda Rousseaux Colin 2012 Haschek and Rousseaux s handbook of toxicologic pathology Second ed Amsterdam Academic Press ISBN 9780124157590 Ross Michael H auteur 27 December 2018 Histology a text and atlas with correlated cell and molecular biology Wolters Kluwer Health ISBN 9781496383426 OCLC 1089540703 a href Template Citation html title Template Citation citation a CS1 maint multiple names authors list link Hofer D Drenckhahn D 1996 Cytoskeletal differences between stereocilia of the human sperm passageway and microvilli stereocilia in other locations Anatomical Record 245 1 57 64 doi 10 1002 SICI 1097 0185 199605 245 1 lt 57 AID AR10 gt 3 0 CO 2 8 PMID 8731041 Robbins Cotran Pathologic Basis of Disease p 1080 External links edit Retrieved from https en wikipedia org w index php title Pseudostratified columnar epithelium amp oldid 1214494292, wikipedia, wiki, book, books, library,
