Information about Pseudostratified Ciliated Columnar Epithelium
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Transverse section of tracheal tissue. Note that image is incorrectly labeled "ciliated stratified epithelium" at upper right.
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 false) 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.
Examples
- Ciliated pseudostratified columnar epithelia are found in the lines of the trachea as well as the upper respiratory tract.
- Non-ciliated pseudostratified columnar epithelia are located in the lining of the male urethra.
Gallery
) Types of epithelia. | ) Pseduostratified columnar ciliated epithelium lining the bronchus (Light Microscope, Hemotoxin and Eosin dye, Magnified 600 times) |
External links
- pseudostratified+epithelium at eMedicine Dictionary
- Diagram at uoguelph.ca
- Bioweb at UWLAX Zoolab
- Histology at KUMC epithel-epith08 "Trachea"
- Slide at ohio-state.edu
Histology: epithelial tissue |
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Types: Columnar (simple, stratified) -
Cuboidal (simple, stratified) -
Pseudostratified/Respiratory -
Squamous (simple, stratified) -
Transitional - Olfactory
Features: Lateral/cell-cell: Tight junction - Adherens junction - Desmosome - Gap junction Basal/cell-matrix: Basal lamina - Hemidesmosome - Focal adhesion Apical: Cilia - Microvilli - Stereocilia
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epithelium is a tissue composed of a layer of cells. Epithelium lines both the outside (skin) and the inside cavities and lumen of bodies. The outermost layer of our skin is composed of dead stratified squamous, keratinized epithelial cells.
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nucleus (3) ribosome (4) vesicle (5) rough endoplasmic reticulum (ER) (6) Golgi apparatus (7) Cytoskeleton (8) smooth ER (9) mitochondria (10) vacuole (11) cytoplasm (12) lysosome (13) centrioles]]
In cell biology, the nucleus (pl.
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In cell biology, the nucleus (pl.
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Stratified columnar epithelia have several layers, with columnar cells as the outermost of these.
Stratified columnar epithelia are found in the uterus and parts of the anus and eye and the male urethra and vas deferens and in parts of the pharynx.
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Stratified columnar epithelia are found in the uterus and parts of the anus and eye and the male urethra and vas deferens and in parts of the pharynx.
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squamous epithelium (from Latin squama, "scale") is an epithelium characterised by its most superficial layer consisting of flat, scale-like cells called squamous cells.
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Cuboidal epithelia are cube-shaped epithelial cells present in single layers (Simple cuboidal epithelium) or multiple layers (Stratified cuboidal epithelium), depending on their location in the body.
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trachea, or windpipe, is a tube that has an inner diameter of about 20-25 mm and a length of about 10-16cm. It extends from the larynx to the primary (main) bronchi in mammals, and from the pharynx to the syrinx in birds, allowing the passage of air to the lungs.
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The Upper respiratory tract refers to the following parts of the respiratory system:
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- nose
- throat:pharynx and larynx
External links
- Image at rsdrx.com
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In anatomy, the urethra is a tube which connects the urinary bladder to the outside of the body. The urethra has an excretory function in both genders to pass urine to the outside, and also a reproductive function in the male, as a passage for sperm.
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cilium (plural cilia) is an organelle found in eukaryotic cells. Cilia are thin, tail-like projections extending approximately 5–10 micrometers outwards from the cell body.
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eMedicine is an online clinical medical knowledge base that was founded in 1996 by Scott Plantz and Richard Lavely, two medical doctors. It was sold to WebMD in January 2006.
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University of Wisconsin–La Crosse (also known as UW–La Crosse, Wisconsin-La Crosse, or UW-L) is a public university located in La Crosse, Wisconsin, USA.
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University of Kansas (often referred to as KU or just Kansas) is an institution of higher learning in Lawrence, Kansas. The main campus resides atop Mount Oread. The University was founded in 1865 by the citizens of Lawrence under a charter from the Kansas Legislature.
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Histology (from the Greek ἱστός) is the study of tissue sectioned as a thin slice, using a microtome. It can be described as microscopic anatomy.
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epithelium is a tissue composed of a layer of cells. Epithelium lines both the outside (skin) and the inside cavities and lumen of bodies. The outermost layer of our skin is composed of dead stratified squamous, keratinized epithelial cells.
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Columnar epithelia are epithelial cells whose heights are at least twice their width. Columnar epithelia are divided into simple (or unilayered), and stratified (or multi-layered).
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Simple columnar epithelia are further divided into two categories: nonciliated and ciliated.
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Simple columnar epithelia are further divided into two categories: nonciliated and ciliated.
Nonciliated
Nonciliated columnar epithelia..... Click the link for more information.
Stratified columnar epithelia have several layers, with columnar cells as the outermost of these.
Stratified columnar epithelia are found in the uterus and parts of the anus and eye and the male urethra and vas deferens and in parts of the pharynx.
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Stratified columnar epithelia are found in the uterus and parts of the anus and eye and the male urethra and vas deferens and in parts of the pharynx.
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Cuboidal epithelia are cube-shaped epithelial cells present in single layers (Simple cuboidal epithelium) or multiple layers (Stratified cuboidal epithelium), depending on their location in the body.
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Simple cuboidal eplithelia are epithelial cells with a cuboidal shape arranged in a single layer. Simple cuboidal epithelia is found on the surface of ovaries, the lining of nephrons, the walls of the renal tubules, and parts of the eye and thyroid.
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Stratified cuboidal epithelia are multi-layered.
They protect areas such as ducts of sweat glands and the male urethra.
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They protect areas such as ducts of sweat glands and the male urethra.
Additional images
Types of epithelium
External links
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squamous epithelium (from Latin squama, "scale") is an epithelium characterised by its most superficial layer consisting of flat, scale-like cells called squamous cells.
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squamous epithelium (from Latin squama, "scale") is an epithelium characterised by its most superficial layer consisting of flat, scale-like cells called squamous cells.
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squamous epithelium (from Latin squama, "scale") is an epithelium characterised by its most superficial layer consisting of flat, scale-like cells called squamous cells.
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Transitional epithelia is a type of tissue consisting of multiple layers of epithelial cells which can contract and expand. These cells, part of the epithelium, are usually found in the urinary tract, especially around the urinary bladder.
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The olfactory epithelium is a specialized epithelial tissue inside the nasal cavity that is involved in smell. In humans, it measures about 1 inch wide by 2 inches long (about 2 cm by 5 cm) and lies on the roof of the nasal cavity about 3 inches (about 7 cm) above and behind the
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A cell junction is a structure within a tissue of a multicellular organism. Cell junctions are especially abundant in epithelial tissues. They consist of protein complexes and provide contact between neighbouring cells, between a cell and the extracellular matrix, or they built up
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Tight junctions, or zonula occludens, are the closely associated areas of two cells whose membranes join together forming a virtual impermeable barrier to fluid. It is a type of junctional complex only present in vertebrates.
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Adherens junctions (or zonula adherens) are protein complexes that occur at cell-cell junctions in epithelial tissues, usually more basal than tight junctions.
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desmosome, also known as macula adherens (Latin: adhering spot), is a cell structure specialized for cell-to-cell adhesion. A type of junctional complex, they are localized spot-like adhesions randomly arranged on the lateral sides of plasma membranes.
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