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Topic: Transitional epithelia


  
  Epithelium - Wikipedia, the free encyclopedia
Transitional: This is a specialized type of epithelium found lining organs that can stretch, such as the urothelium that lines the bladder and ureter of mammals.
Since the cells can slide over each other, the appearance of this epithelium depends on whether the organ is distended or contracted: if distended, it appears as if there are only a few layers; when contracted, it appears as if there are several layers.
All epithelia derive from either the ectoderm or the endoderm, two embryological structures.
en.wikipedia.org /wiki/Epithelial   (726 words)

  
 Epithelial Tissue   (Site not responding. Last check: 2007-10-11)
The cells near the base of the epithelia are cuboidal to columnar in appearance, but that the outermost layer of cells is squamous in shape.
There is a transition from keratinized (outer) to non-keratinized (eye side) of the stratified squamous epithelia.
Transitional epithelia is a special type of epithelia restricted to the excretory passages of the urinary system (renal pelvis, most of the urethra and bladder).
anatomy.iupui.edu /courses/histo_D502/D502f04/Labs.f04/Lab2/Lab2f04.html   (3288 words)

  
 Blue Histology - Epithelia and Glands
Epithelia are classified on the basis of the number of cell layers and the shape of the cells in the surface layer.
Stratified columnar epithelia are found in the excretory ducts of the mammary gland and the main excretory duct of the large salivary glands.
Transitional epithelium is found exclusively in the excretory urinary passages (the renal calyces and pelvis, the ureter, the urinary bladder, and part of the urethra).
www.lab.anhb.uwa.edu.au /mb140/CorePages/Epithelia/Epithel.htm   (4083 words)

  
 Squamous cell - Wikipedia, the free encyclopedia
Epithelia lined by squamous cells can be classified as either stratified or simple.
In simple squamous epithelia all the cells are in contact with the basal lamina (basement membrane) of the epithelium, whereas in stratified squamous epithelia the cells which line the epithelium are arranged in layers and as such some of them won't be in contact with the basement membrane.
Other epithelia include columnar epithelia, cuboidal epithelia and transitional epithelia.
en.wikipedia.org /wiki/Squamous   (138 words)

  
 PPT Slide   (Site not responding. Last check: 2007-10-11)
Epithelia serve a variety of functions and are classified according to (1) number of cell layers, (2) shape of superficial cells and (3) modifications at their free surface.
Hence, there are "simple" (monolayer of cells) and "stratified" (at least 2 cell layers) epithelia; additionally there are "pseudostratified" and "transitional" epithelia.
Epithelia are named by the shape of their most superficial cells.
astro.temple.edu /~sodicm/labs/EpithWeb/tsld003.htm   (87 words)

  
 EPITHELIA
Epithelia are cells which are linked tightly together by intercellular junctions to form a planar sheet.
In stratified epithelia, the basal layer of cells rests on the basal lamina, but subsequent layers do not, and are simply stacked on top of the basal layer.
The transitional epithelium is the mucosal surface while the simple squamous epithelium is the serosal surface.
medocs.ucdavis.edu /CHA/402/labsyl/01/02.htm   (2408 words)

  
 transitional cells
From the pelvis to the beginning of the urethra, the walls of the urinary tract is lined with a stratified transitional epithelia.
Transitional cells are normal elements of the urinary sediment.
Contrarily to the isolated cells, the presence of transitional epithelial fragments is almost always associated to an abnormal situation.
www.agora.crosemont.qc.ca /urinesediments/doceng/doc_037.htm   (327 words)

  
 cytokeratins
The various epithelia in the human body usually express cytokeratins which are not only characteristic of the type of epithelium, but also related to the degree of maturation or differentiation within an epithelium.
The transitional epithelium of the urinary bladder expresses cytokeratins 4 and 13 together with the cytokeratins of the “simple” epithelia i.e.
Combined epithelia, morphologically characterized by a basal cell layer and a layer of columnar cells both in contact with the basement membrane.
www.mubio.com /frameset2/anitibodies/body_cytokeratins.htm   (555 words)

  
 Water channel protein AQP3 is present in epithelia exposed to the environment of possible water loss.   (Site not responding. Last check: 2007-10-11)
In the digestive tract, abundant AQP3 was found in the stratified epithelia in the upper part, from the oral cavity to the forestomach, and in the simple and stratified epithelia in the lower part, from the distal colon to the anal canal.
In the respiratory tract, AQP3 was present in the pseudostratified ciliated epithelia from the nasal cavity to the intrapulmonary bronchi.
Interestingly, AQP3 was present at the basal aspects of the epithelia: in the basolateral membranes in the simple epithelia and in the multilayered epithelia at plasma membranes of the basal to intermediate cells.
www.arclab.org /medlineupdates/abstract_10490456.html   (271 words)

  
 Water Channel Protein AQP3 Is Present in Epithelia Exposed to the Environment of Possible Water Loss -- Matsuzaki et ...
of mammalian transitional epithelium of the urinary tract is
Hicks RM (1965) The fine structure of the transitional epithelium of rat ureter.
Hicks RM (1966) The permeability of rat transitional epithelium.
www.jhc.org /cgi/content/full/47/10/1275   (5656 words)

  
 Expression of the Bcl-2 Protein in Nasal Epithelia of F344/N Rats during Mucous Cell Metaplasia and Remodeling -- ...
The three regions of transitional epithelia lining the lateral wall (LW) and the nasoturbinates (NT) and maxilloturbinates (MT) and the respiratory epithelium of the midseptum (MS) are shown, where the number of mucous cells was determined after alcian blue staining of tissue sections.
Detection of Bcl-2 by Western blot analysis in nasal epithelia of rats exposed to 0.5 ppm ozone for 1 mo. Protein was extracted from the nasal epithelia removed from the septum and turbinates of rats exposed to ozone for 1 mo, and 120 µg was analyzed by Western blotting using Bcl-2 antibodies at 1:1,000 dilution.
The percentage of Bcl-2-positive mucous cells in nasal epithelia of rats exposed to air or to ozone for 1, 3, and 6 mo and in rats maintained in filtered air for a recovery period of 13 wk after a 3-mo ozone exposure.
ajrcmb.atsjournals.org /cgi/content/full/18/6/794   (3827 words)

  
 [No title]
This tissue called transitional epithelia and is only found in the urinary system.
This epithelia is pseudostratified ciliated columnar epithelia, and is only found in the respiratory tract.
Also note that it appears that this type of epithelia is multilayered, but in reality is only a single layer.
www.upt.pitt.edu /ntress/Bio1_Lab_Manual_New/histology_exercise.htm   (846 words)

  
 Regulation of vocal fold transepithelial water fluxes -- Fisher et al. 91 (3): 1401 -- Journal of Applied Physiology
Numerous lymphatics (L) and the duct (D) of an exocrine gland underlying the stratified squamous epithelium are identified.
epithelium and the transitional epithelium of the inferior and
wet, stratified, squamous epithelia of the mammalian aerodigestive
jap.physiology.org /cgi/content/full/91/3/1401   (5526 words)

  
 [No title]
If it is simple squamous epithelia, it would be one layer of irregularly shaped cells.
Cuboidal epithelia can be found in many areas of the body and include simple cuboidal, stratified cuboidal, and specialized cuboidal epithelia.
The specialized cuboidal is called transitional epithelia and is only found in the urinary system, particularly the urinary bladder.
www.upt.pitt.edu /ntress/Bio1_Lab_Manual_New/histology_intro.htm   (772 words)

  
 ZOOLOGY 251
Examine a slide of lung tissue to locate simple squamous epithelia in the wall of the air sacs.
Use this slide to recognize the general characteristics of epithelial tissue.
Identify the stratum basal, stratum spinosum, stratum granulosum, and stratum corneum.
www.centralia.ctc.edu /Depts/Science/Zool251/251lab3.html   (480 words)

  
 c_products
Reacts with a subgroup of glandular epithelia and their tumors, as well as transitional epithelium and transitional carcinoma.
Reacts with keratinizing stratified epithelia and in differentiated areas of highly differentiated squamous cell carcinomas.
Reacts with non-keratinizing stratified epithelia and transitional epithelium,as well as carcinomas derived from these tissues.
www.mubio.com /frameset2/anitibodies/body_c_products.htm   (376 words)

  
 UW Libraries - Audio Visual Database Result Detail   (Site not responding. Last check: 2007-10-11)
Examples of simple squamous, cuboidal, and columnar epithelia are presented.
Multilayered keratinizing and non-keratinizing stratified squamous epithelia are shown.
Rare stratified columnar epithelia are shown followed by a discussion of pseudostratified epithelia.
www-lib.uwyo.edu /uwlibs/avdbdetail.cfm?id=110   (40 words)

  
 Group A   (Site not responding. Last check: 2007-10-11)
The importance of transitional epithelia relates to the ability of the cells to:
When discussing epithelia, another term used to refer to the basal side of a layer of cells is:
In terms of type of cells present, cell interaction, degree of vascularization and amount of extracellular material, compare and contrast epithelia and connective tissues.
mtsu32.mtsu.edu:11024 /Lecture_Materials/Exam_Questions/Tissues_A.htm   (445 words)

  
 Chemicon - Product #MAB3404 - Anti-Cytokeratin 18, clone CK2
This antibody is used for staining research samples of a wide variety of simple epithelia and simple glandular epithelia (e.
intestinal, respiratory and urinary epithelia) and transitional epithelia (e.
bladder), but stratified squamous epithelia are not stained (e.
www.chemicon.com /Product/ProductReferences.asp?ProductItem=MAB3404   (808 words)

  
 Covance Research Products Online Store: Product Datasheet   (Site not responding. Last check: 2007-10-11)
Cytokeratins are, generally, held to be the most ubiquitous markers of epithelial differentiation, and, so far, 20 distinct types numbered by Moll have been revealed.
The CK 5 is a high molecular weight, basic type of cytokeratin, with a molecular mass of 58 kDa, expressed in the basal, the intermediate and the superficial cell layers of stratified epithelia as well as in transitional epithelia, complex epithelia, and in mesothelial cells and mesothelioma.
CK 6 is also a high molecular weight, basic type of cytokeratin, with a molecular mass of 56 kDa, expressed by proliferating squamous epithelium often paired with CK 16 (48 kDa).
store.crpinc.com /datasheet.aspx?catalogno=MMS-181P   (499 words)

  
 p63 Expression Profiles in Human Normal and Tumor Tissues -- Di Como et al. 8 (2): 494 -- Clinical Cancer Research
Expression of p63 in Stratified and Transitional Epithelia.
Stratified epithelia, such as the epidermis of the skin (A) and the exocervical mucosa (B), displayed intense p63 nuclear immunoreactivity in the basal layer with a gradual diminution of nuclear intensity in the more terminally differentiated cell layers.
Tumors derived from stratified epithelia, such as basal cell carcinoma of the skin (A), SCC of the tongue (B), and SCC of the cervix (C), showed strong p63 nuclear reactivity.
clincancerres.aacrjournals.org /cgi/content/full/8/2/494   (4879 words)

  
 [No title]   (Site not responding. Last check: 2007-10-11)
Transitional epithelia are found in some organs that
They are difficult to place into other categories because their cell shape changes depending on the degree of stretch.
This can be seen below the covering mucus in the accompanying photos.
capital2.capital.edu /faculty/kromsted/histology/Transitional.htm   (56 words)

  
 eMedicine - Pemphigus, Paraneoplastic : Article Excerpt by: Lynne J Goldberg, MD   (Site not responding. Last check: 2007-10-11)
IDIF observation of circulating antibodies specific for stratified squamous or transitional epithelia (transitional epithelium)
Pathophysiology: Paraneoplastic pemphigus is an autoimmune disorder initiated by an underlying lymphoproliferative disorder.
Tumor antigens are hypothesized to evoke both a humoral and a cellular immune response that leads to blistering in mucosa and other epithelia.
www.emedicine.com /derm/byname/pemphigus-paraneoplastic.htm   (428 words)

  
 APC 100   (Site not responding. Last check: 2007-10-11)
Classification of epithelia is based upon two factors:
The shape of the cells lining the surface.
In transitional epithelia, the number of layers and cell shape varies depending on the state of contraction or distension of the tissue.
trc.ucdavis.edu /mjguinan/apc100/modules/TermsCells&Tissues/epithelial/epitypes/epitypes7.html   (38 words)

  
 Human protein: Q14210 - Lymphocyte antigen Ly-6D precursor (E48 antigen). EMBL Bioinformatics Harvester
It is produced through a collaboration between the Swiss Institute of Bioinformatics and the EMBL outstation - the European Bioinformatics Institute.
May be involved in cell-cell adhesion and signal transduction.
Expressed exclusively at the outer cell surface of transitional epithelia and the keratinocyte of stratified squamous epithelia.
harvester.embl.de /harvester/Q142/Q14210.htm   (657 words)

  
 A 22-kd surface antigen detected by monoclonal antibody E 48 is exclusively expressed in stratified squamous and ...
A 22-kd surface antigen detected by monoclonal antibody E 48 is exclusively expressed in stratified squamous and transitional epithelia -- Quak et al.
A 22-kd surface antigen detected by monoclonal antibody E 48 is exclusively expressed in stratified squamous and transitional epithelia
detects an epitope present exclusively in squamous and transitional
ajp.amjpathol.org /cgi/content/abstract/136/1/191   (479 words)

  
 4
Found in the pharynx, male urethra, and lining some glandular ducts
Also occurs at transition areas between two other types of epithelia
Several cell layers, basal cells are cuboidal, surface cells are dome shaped
www.blinn.edu /brazos/natscience/vs/A&PIch4.htm   (990 words)

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