Squamous cells
Squamous Cells
Squamous cells (/ˈskweɪməs/; from Latin squamōsus, "covered with scales") are a type of epithelial cell that are flat and thin, resembling the scales of a fish. They are found in many places throughout the body, including the skin, the esophagus, and the lining of the alveoli in the lungs.
Etymology
The term "squamous" is derived from the Latin word squamōsus, which means "covered with scales". This is a reference to the flat, scale-like appearance of these cells.
Function
Squamous cells function primarily to provide a barrier in the body. In the skin, they help to prevent water loss and protect against environmental damage. In the esophagus, they help to protect against the abrasive effects of food passing down into the stomach. In the alveoli, they allow for the efficient exchange of gases between the lungs and the bloodstream.
Related Terms
- Squamous cell carcinoma: A type of cancer that begins in the squamous cells. It is the second most common form of skin cancer.
- Squamous epithelium: A type of epithelium that is composed of squamous cells.
- Keratinocyte: The primary type of cell found in the epidermis, the outermost layer of skin. Keratinocytes are a type of squamous cell.
- Stratified squamous epithelium: This is a type of tissue composed of multiple layers of squamous cells. It is found in areas of the body that need to withstand friction and wear and tear, such as the skin, mouth, and esophagus.
External links
- Medical encyclopedia article on Squamous cells
- Wikipedia's article - Squamous cells
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