Stratum Corneum
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Definition:
The stratum corneum is the outermost layer of the epidermis and is made of dead, flat skin cells that shed about every 2 weeks.
The cells of the stratum corneum are held together by an overlapping mechanism and with proteins that serve as a binding "glue". The stratum corneum serves an important barrier function by keeping molecules from passing into and out of the skin, thus protecting the lower layers of skin. Disorders such as atopic dermatitis arise when this barrier function does not work properly.
Pronunciation:
STRAT-um KOR-ni-um • (noun)
Related Resources:
Skin Anatomy
Learn more about the structure and function of normal skin.
Atopic Dermatitis
Find out more about this chronic skin condition, also known as "the itch that rashes".
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