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Stratified columnar epithelium is initially present in parts of the gastrointestinal tract in utero, before being replaced with other types of epithelium. For example, by 8 weeks, it covers the lining of the stomach. [7] [8] By 17 weeks, it is replaced by simple columnar epithelium. [7] This is also found in the fetal esophagus. [8]
By layer, epithelium is classed as either simple epithelium, only one cell thick (unilayered) or stratified epithelium as stratified squamous epithelium, stratified cuboidal epithelium, and stratified columnar epithelium that are two or more cells thick (multi-layered), [2] [3] and both types of layering can be made up of any of the cell shapes ...
In the oesophagus, pharynx and external anal canal the epithelium is stratified, squamous and non-keratinising, for protective purposes. In the stomach, the epithelium is simple columnar, and is organised into gastric pits and glands to deal with secretion. [1] In the small intestine, epithelium is simple columnar and specialised for absorption.
Simple columnar, ciliated - reproductive - female: endometrium : Simple columnar, ciliated - reproductive - female: cervix : Simple columnar - reproductive - female: cervix : Stratified squamous, non-keratinized - reproductive - female: vaginal epithelium: Stratified squamous, non-keratinized - reproductive - female: labia majora
By layer, epithelium is classed as either simple epithelium, only one cell thick (unilayered), or stratified epithelium having two or more cells in thickness, or multi-layered – as stratified squamous epithelium, stratified cuboidal epithelium, and stratified columnar epithelium, [8]: 94, 97 and both types of layering can be made up of any of ...
Simple columnar epithelium is a single layer of columnar epithelial cells which are tall and slender with oval-shaped nuclei located in the basal region, attached to the basement membrane. In humans, simple columnar epithelium lines most organs of the digestive tract including the stomach , and intestines .
The respiratory epithelium lining the upper respiratory airways is classified as ciliated pseudostratified columnar epithelium. [4] This designation is due to the arrangement of the multiple cell types composing the respiratory epithelium. While all cells make contact with the basement membrane and are, therefore, a single layer of cells, their ...
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.