Simple columnar epithelium

Simple columnar epithelium
The stomach wall, with simple columnar epithelium visible as a lining at the top.
Identifiers
TH	H2.00.02.0.02020
FMA	45567
Anatomical terminology

A simple columnar epithelium is a columnar epithelium that is uni-layered. In humans, a simple columnar epithelium lines most organs of the digestive tract including the stomach, small intestine, and large intestine. Simple columnar epithelia line the uterus.

Structure

Simple columnar epithelium is further divided into two categories: ciliated and non-ciliated.

Location

Non-ciliated types are found in the digestive tract.Ciliated types are found within bronchioles of the respiratory tract and in the oviduct of the female reproductive tract.

Ciliated

Ciliated columnar epithelium moves mucus and other substances via cilia and is found in the upper respiratory tract, the Fallopian tubes, the uterus, and the central part of the spinal cord.They are the primary target of infection for "common cold viruses" such as coronaviruses, influenza virus and rhinoviruses. These viruses may kill the ciliated cells or stop the cilia beating. In either case, mucus builds up and forms a good site for secondary bacterial infections, resulting in mucus.

A ciliated columnar epithelium lines the lumen of the uterine tube, where currents generated by the cilia propel the egg cell toward the uterus.

Non-ciliated

This is found lining sections of the gastrointestinal tract and may be brush bordered.

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• 
  Transverse section of a villus, from the human intestine. X 350.
  a. Basement membrane, here somewhat shrunken away from the epithelium.
  b. Lacteal.
  c. Columnar epithelium.
  d. Its striated border.
  e. Goblet cells.
  f. Leucocytes in epithelium.
  f’. Leucocytes below epithelium.
  g. Bloodvessels.
  h. Muscle cells cut across.

References

External links

• Histology at KUMC epithel-epith05 "Gall bladder" - Simple columnar epithelium
• UIUC Histology Subject 1061 - Uterine tube lumen