Colorado Esthetician Written Practice Exam 2025 – Comprehensive All-in-One Guide for Exam Success!

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Which layer of the epidermis is also known as the "horny layer"?

Stratum Corneum

The correct answer is the Stratum Corneum. This outermost layer of the epidermis is known as the "horny layer" because it is made up of dead skin cells (corneocytes) that are constantly being shed and replaced. The Stratum Granulosum, Stratum Lucidum, and Stratum Spinosum are all layers of the epidermis, but they do not correspond to the term "horny layer."

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Stratum Granulosum

Stratum Lucidum

Stratum Spinosum

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