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Cosmetology · Skin Science

Collagen and elastin, which give skin its strength and flexibility, are found primarily in the:

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Correct answer

Dermis

  1. A Dermis
  2. B Free edge
  3. C Epidermis
  4. D Stratum corneum

Why this is the answer

Collagen and elastin are protein fibers found primarily in the dermis, the deeper living layer of the skin. Collagen gives the skin strength and support, while elastin gives it flexibility and the ability to return to shape. Over time and with sun exposure, these fibers can break down, contributing to wrinkles and sagging. Because many skincare services and concerns relate to the dermis and its fibers, understanding where collagen and elastin are located is part of foundational skin science.
Source: Scientific Concepts — Collagen and Elastin

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About this topic: Skin Science

Skin science covers the layers of the skin, its functions and appendages, skin types, and the lesions and disorders a cosmetologist must recognise, including signs that need medical referral. This is one of 7 Scientific Concepts questions on skin science, each with a full explanation on a single study page.

New to this exam? Our Cosmetology exam guide explains the format, scoring, and how to prepare.

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