Stratified columnar epithelium
# Stratified columnar epithelium

Stratified columnar epithelium is a rare type of epithelial tissue composed of column-shaped cells arranged in multiple layers. It is found in the conjunctiva, pharynx, anus, and male urethra. It also occurs in embryo.

## Location

Stratified columnar epithelia are found in a variety of locations, including:

* parts of the conjunctiva of the eye
* parts of the pharynx
* anus
* male urethra and vas deferens
* excretory duct of mammary gland and major salivary glands

### Embryology

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. By 17 weeks, it is replaced by simple columnar epithelium. This is also found in the fetal esophagus.

## Function

The cells function in secretion and protection.

