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Pseudostratified columnar epithelium, animated image highlights the epithelial cells, goblet cells, then underlying connective tissue
A pseudostratified 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 epithelia. As it
rarely occurs as 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 basal lamina. The nucleus 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.
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.
Contents
1Examples
2Additional images
3References
4External links
Examples
Ciliated pseudostratified columnar epithelia is the type of respiratory epithelium found in the linings of the trachea as well as the upper respiratory tract.
Non-ciliated pseudostratified columnar epithelia are located in the 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.[1] They are structurally and molecularly more similar to microvilli than to true cilia.
Pseudostratified columnar epithelia are found forming the straight, tubular glands of the endometrium in females.[2]
They are also found in the internal part of the ear.
Additional images
Transverse section of tracheal tissue. Note that image is incorrectly labeled "ciliated stratified epithelium" at upper right.
References
^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 links
Slide at ohio-state.edu
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Epithelial tissue
Cells
Squamous
Cuboidal
Columnar
Types
Simple squamous epithelium
Endothelium
Mesothelium
Simple cuboidal epithelium
Simple columnar epithelium
Pseudostratified columnar epithelium
Respiratory epithelium
Stratified squamous epithelium
Stratified cuboidal epithelium
Stratified columnar epithelium
Transitional epithelium
Urothelium
Glands
Types
Mechanism
Merocrine
Eccrine
Apocrine
Holocrine
Sebaceous
Meibomian
Shape
Tubular gland
Alveolar gland
Secretion
Serous glands
Mucous glands
Components
Myoepithelial cell
Serous demilune
Ducts
Intralobular
Striated
Intercalated
Acinus/Lobe
Authority control
TH: H2.00.02.0.02021
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…segments are lined with transitional epithelium that is similar to the bladder and upper urinary tract. The penile urethra is lined with pseudostratified columnar epithelium, and the meatus is lined with stratified …
…variable. A ciliated foregut cyst is a rare, benign solitary cyst consisting of ciliated pseudostratified columnar epithelium, subepithelial connective tissue, a smooth muscle layer, and an outer fibrous capsule …
…the disease is characterized by replacement of the normal pseudostratified columnar epithelium with a metaplastic, predominantly squamous epithelium . This abnormal tissue is devoid of cilia and mucus-producing …
…The cysts are usually single but may be multiloculated. They are lined with ciliated pseudostratified columnar epithelium and the walls contain smooth muscle and elastic tissue. Mucus-producing cells are …
…of non-keratinizing stratified squamous epithelium, whereas the remainder of the larynx is lined by respiratory (ciliated pseudostratified columnar) epithelium; this enables the surface of the vocal fold …
English Journal
Histology, histochemistry and ultrastructure of the nasopharyngeal tonsil of the buffalo (Bubalus bubalis).
Girgiri IA, Kumar P.
Anatomia, histologia, embryologia. 2019 Jun;().
The light microscopic appearance and ultrastructure of the nasopharyngeal tonsil (tonsilla pharyngea), collected from 12 adult buffaloes of local mixed breed, were explored for the distribution of different types of epithelia, lymphoid tissue and high endothelial venules. The tonsillar mucosa was li
Yak (Bos grunniens) Tonsils: Morphological Description and Expression of IgA and IgG.
Sun J, Cui Y, Yu SJ, Xu YF, He JF, Liu PG, Huang YF, Li Q.
Anatomical record (Hoboken, N.J. : 2007). 2019 Jun;302(6)999-1009.
This study aimed to describe the morphology, expression of IgA and IgG in adult yak tonsils. The 12 clinically healthy yak tonsils [3- to 6-year old, n = 12] were examined for morphology using light, and transmission electron microscopes. Expression of IgA and IgG was measured by qRT-PCR, ELISA, and
Ciliated columnar epithelium in the esophagus and gastroesophageal junction: A different perspective from study of a North American population.
Scott B, Cottreau J, Oviedo A, Arnason T.
Annals of diagnostic pathology. 2019 May;41()90-95.
An index case of ciliated columnar epithelium in a gastroesophageal (GE) junction biopsy identified in routine surgical pathology practice struck us as highly unusual. However, pathology literature, mainly from Asian populations, reports ciliated columnar epithelium in up to 40% of tissue samples fr
… Histopathologically, the cysts were lined by pseudostratified ciliated columnarepithelium with abundant goblet cells, while the wall comprised of glands, hyaline cartilage, bronchiole- and alveolus-like structures, smooth muscles, and large, well-developed elastic and muscular arteries. …
A pseudostratified columnar epithelium is a tissue formed by a single layer of cells that give the appearance of being made from multiple layers, especially when seen in cross section.
The epithelium, the outermost layer of the body surface, is consist of a layer (or layers) of similar cells that are bound closely together. Learn about the pseudostratified columnar epithelium (anatomy, types & functions) and find out ...
Function and Location Because pseudostratified columnar epithelium are thick cells, they are useful in the process of absorbing and secreting substances as well as in creating a barrier between substances flowing through the cavity ...