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Epidermis is the thin, tough, outermost layer of skin on humans and animals. It is waterproof and when undamaged prevents bacteria, viruses and other substances from entering the body. The epidermis is much thicker in bodily places that need extra protection, such as the palms of the hands and the soles of the feet.


The epidermis lies directly on top of the dermis, which contains blood and lymph vessels, glands and hair follicles. The glands in the dermis produce sweat and sebum (an oily substance that prevents skin from becoming too dry), which reach the epidermis via tiny openings called pores. 


Epidermis is comprised of several types of cells: keratinocytes, corneocytes, squamous cells, basal cells, and melanocytes, which produce the melanin that filters out ultraviolet radiation from sunlight and also gives skin its color. The skin is constantly renewing itself, with keratinocytes going on a 4 to 6 week journey called a keratinization process that ends with the cells dying and flaking off. 


The word epidermis stems from the Greek word epi, which means over or upon. 

Skin Deep: Epidermal Foot Care for Diabetics
Skin Deep
Step-By-Step Epidermal Care For Diabetics

Proper skin care is essential for people with diabetes, but moisture balance is especially important for diabetic feet.