The stratum lucidum is a thin, clear layer of dead skin cells found in the epidermis, the outermost layer of skin. It's named for its translucent appearance under a microscope. This layer is only present in areas of thick skin, like the palms of the hands and the soles of the feet.
The stratum lucidum acts as a protective barrier against friction, providing a smooth and durable surface for these high-wear areas. It's located between the stratum granulosum and the stratum corneum, the outermost layer of the epidermis.
The stratum lucidum is composed of cells called keratinocytes, which have lost their nuclei and are filled with a protein called eleidin. This protein gives the stratum lucidum its translucent quality and helps to provide its protective function.
Key points:
- Location: Found in the epidermis, specifically in thick skin areas.
- Appearance: Translucent under a microscope.
- Composition: Dead keratinocytes filled with eleidin.
- Function: Protection against friction, providing a smooth and durable surface.
