Columnar cell
Columnar Cell
Columnar cells (/kəˈlʌmnər sɛlz/) are a type of epithelial cell that have a height greater than their width, resembling a column. They are found in various locations in the body, including the gastrointestinal tract, respiratory tract, and reproductive system.
Etymology
The term "columnar" is derived from the Latin word "columna", meaning "pillar", and the suffix "-ar", meaning "pertaining to". This is in reference to the shape of these cells, which resemble a column or pillar. The term "cell" comes from the Latin "cella", meaning "small room", which is a reference to the microscopic compartments that make up all living organisms.
Function
Columnar cells are primarily involved in absorption and secretion. In the gastrointestinal tract, for example, they absorb nutrients from the food we eat. In the respiratory tract, they secrete mucus to trap and remove foreign particles. In the reproductive system, they play a role in the transport of eggs and sperm.
Related Terms
- Epithelial cell: A type of cell that lines the surfaces of your body. They are found on your skin, blood vessels, urinary tract, and organs.
- Gastrointestinal tract: The pathway from the mouth to the anus where the processes of digestion and absorption take place.
- Respiratory tract: The passage that makes up the respiratory system, which includes the nose, mouth, throat, larynx, trachea, bronchi, and lungs.
- Reproductive system: The system of sex organs within an organism which work together for the purpose of sexual reproduction.
External links
- Medical encyclopedia article on Columnar cell
- Wikipedia's article - Columnar cell
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