title: Stratified columnar epithelium
text: # 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.
  
  