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simple columnar epithelium
The stomach wall, with simple columnar epithelium visible as a lining at the top.
Details
Identifiers
Latinepithelium simplex columnare
THH2.00.02.0.02020
FMA45567
Anatomical terminology

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. Simple columnar epithelium also lines the uterus.

Structure

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See also: Cilia and Mucociliary clearance

Simple columnar epithelium is further divided into two categories: ciliated and non-ciliated (glandular). The ciliated part of the simple columnar epithelium has tiny hairs which help move mucus and other substances up the respiratory tract.

The shape of the simple columnar epithelium cells are tall and narrow giving a column like appearance. the apical surfaces of the tissue face the lumen of organs while the basal side faces the basement membrane.[1] The nuclei are located closer along the basal side of the cell.[1]

Absorptive columnar epithelium is characterized as having a striated border on its apical side, this border is made up of non-motile microvilli allowing for increase surface area for absorption.[1] These are known as non-ciliated columnar epithelium. Non-ciliated simple columnar epithelium is made up of glandular goblet cells which secrete mucin to form mucus.[1] The rest of the cell is made up of cytoplasm with membrane bound secretory granules which secrete the mucin, and are found towards the apical surface of the cell.[1]

Ciliated

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See also: Respiratory epithelium

Ciliated columnar epithelium has many cilia which moves mucus and other substances via mucociliary clearance in the respiratory tract.

It is present in the lining of the fallopian tubes, where currents generated by the cilia propel the egg cell toward the uterus.

Ciliated columnar epithelium forms the neuroepithelium of the ependyma that lines the ventricles of the brain and central canal of the spinal cord. These cilia move the cerebro-spinal fluid (CSF).

Non-ciliated

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These are found in the lining sections of the gastrointestinal tract (inner lining of oesophagus, stomach, etc.) and may be brush bordered.

Function

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References

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  1. ^ a b c d e f g h "Simple epithelium". Kenhub. Retrieved 2021-03-19.
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📚 Artikel Terkait di Wikipedia

Epithelium

columnar, and cuboidal. These can be arranged in a singular layer of cells as simple epithelium, either simple squamous, simple columnar, or simple cuboidal

Goblet cell

Goblet cells are simple columnar epithelial cells that secrete gel-forming mucins, like mucin 2 in the lower gastrointestinal tract, and mucin 5AC in

Stratified columnar epithelium

by simple columnar epithelium. This is also found in the fetal esophagus. The cells function in secretion and protection. Pseudostratified columnar epithelium

Barrett's esophagus

esophagus. The cells change from stratified squamous epithelium to simple columnar epithelium, interspersed with goblet cells that are normally only found

Duct (anatomy)

more likely to classified with simple columnar epithelium (or pseudostratified epithelium), reserving the stratified columnar for the lobar ducts. Section

Collecting duct system

to rest of the collecting system. The duct is lined by a layer of simple columnar epithelium resting on a thin basement membrane. The epithelium is composed

Pseudostratified columnar epithelium

Pseudostratified columnar epithelium is a type of epithelium that, though comprising only a single layer of cells, has its cell nuclei positioned in a

Male accessory gland

different species. Each of these branched tubular glands lined by simple columnar epithelium is an enlargement of the vas deferens in its terminal portion