Stratified columnar epithelium
Tissue type
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Through Epithelium, Urethra and 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.
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Function
The cells function in secretion and protection.
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