columnar epithelium


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epithelium

 [ep″ĭ-the´le-um] (pl. epithe´lia) (Gr.)
the cellular covering of internal and external surfaces of the body, including the lining of vessels and other small cavities. It consists of cells joined by small amounts of cementing substances. Epithelium is classified into types on the basis of the number of layers deep and the shape of the superficial cells.
ciliated epithelium epithelium bearing vibratile, hairlike processes (cilia) on its free surface.
columnar epithelium epithelium whose cells are of much greater height than width.
cuboidal epithelium epithelium whose cells are of approximately the same height and width, and appear square in transverse section.
germinal epithelium thickened peritoneal epithelium covering the gonad from earliest development; formerly thought to give rise to germ cells.
glandular epithelium that composed of secreting cells.
pigmentary epithelium (pigmented epithelium) that made of cells containing granules of pigment.
sense epithelium (sensory epithelium) neuroepithelium (def. 1).
simple epithelium that composed of a single layer of cells.
squamous epithelium that composed of flattened platelike cells.
stratified epithelium epithelium made up of cells arranged in layers.
transitional epithelium a type characteristically found lining hollow organs, such as the urinary bladder, that are subject to great mechanical change due to contraction and distention; originally thought to represent a transition between stratified squamous and columnar epithelium.

co·lum·nar ep·i·the·li·um

epithelium formed of a single layer of prismatic cells taller than they are wide.

columnar epithelium

n.
Epithelium consisting of one or more cell layers, the most superficial of which is composed of elongated and somewhat cylindrical cells projecting toward the surface.

co·lum·nar ep·i·the·li·um

(kō-lŭm'năr ep'i-thē'lē-ŭm)
Epithelium formed of a single layer of prismatic cells taller than they are wide.

columnar epithelium

see EPITHELIUM.
References in periodicals archive ?
(27) reported a simple cuboidal epithelium at the 15th-20th week of development, but a simple columnar epithelium at the 21st-22nd week of development.
Observed in (a): disorganization of the gastric glands (arrows) and of the columnar simple epithelium in the gastric pits (enlarged detail, arrowhead) with cellular necrosis (dashed arrow); in (b): columnar simple epithelium of the pits (enlarged detail) and well-preserved gastric glands (arrows); in (c): gastric mucosa with slight exfoliations of the columnar simple epithelium and unpreserved gastric mucosa (asterisk); in (d): preserved gastric mucosa (asterisk) with exfoliations of discrete columnar epithelium (enlarged detail, arrow); and in (e): preserved gastric mucosa (asterisk) and simple columnar simple epithelium (enlarged detail).
Microscopic sections showed a fibrous cyst lined with a serous columnar epithelium (Figure-2).
Barrett's esophagus (BE) is defined as a condition of the lower esophagus in which the normal squamous epithelium is replaced by columnar epithelium as a result of chronic gastroesophageal reflux (GERD) (1).
Barrett's esophagus (BE), an increasingly significant clinical condition in which metaplastic columnar epithelium replaces the normal distal esophageal squamous mucosa, is a complication of gas-troesophageal reflux disease (GERD).
Vesicular glands of Eastern European hedgehog is almost similar to other mammals is having simple columnar epithelium [1].
Microscopically, the cyst demonstrated a flat epithelium, which varied from a mucin-producing columnar epithelium to a cuboidal epithelium (Figure 2, Panel A).
mystus consisted of simple columnar epithelium that contains Goblet cells, similar to the histological structure in herbivorous fish, Labeo niloticus [22].
Barrett's oesophagus (BO) is defined as the occurrence of metaplastic, specialised columnar epithelium lining the distal part of the oesophagus.
Histopathological examination showed a cyst wall predominantly lined by ciliated pseudo stratified columnar epithelium with interspersed goblet cells and partly by stratified squamous epithelium.
Microscopic examination of the lesion showed cystic spaces and ducts lined predominantly by flattened and, to a lesser extent, by columnar epithelium, identical to that seen within the normal epididymis.