Corneal epithelium
Corneal Epithelium
The Corneal Epithelium (pronounced: kɔːrˈniːəl ˌepɪˈθiːliəm) is the outermost layer of the cornea, the clear front surface of the eye.
Etymology
The term "Corneal Epithelium" is derived from the Latin word 'cornea', which means 'horny', and the Greek word 'epithelium', which means 'on the nipple'.
Function
The Corneal Epithelium serves as a barrier to protect the eye from foreign substances such as dust, bacteria, and other microorganisms. It also plays a crucial role in the eye's refractive power and contributes to the overall health and clarity of the cornea.
Structure
The Corneal Epithelium is composed of several layers of cells. The outermost layer is the squamous cell layer, followed by the wing cell layer, and the basal cell layer. These cells are continuously regenerated from the basal cell layer and are shed from the squamous cell layer.
Related Terms
- Cornea: The clear front surface of the eye.
- Epithelium: A thin layer of tissue that covers organs, glands, and other structures within the body.
- Squamous cell: A type of epithelial cell that is flat and scale-like.
- Wing cell: A type of epithelial cell that is larger than a basal cell but smaller than a squamous cell.
- Basal cell: A type of epithelial cell that is found at the base of the epithelium.
External links
- Medical encyclopedia article on Corneal epithelium
- Wikipedia's article - Corneal epithelium
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