Michigan Esthetician State Board Practice Exam

Which layer of the skin is the thickest?

1. Epidermis

2. Dermis

3. Hypodermis

4. Stratum corneum

The correct answer is: Dermis

The dermis is the thickest layer of the skin and plays a crucial role in the overall structure and function of the integumentary system. It resides beneath the epidermis and is primarily composed of connective tissue, which includes collagen and elastin fibers. These components provide strength, elasticity, and support to the skin. The dermis houses important structures such as blood vessels, nerve endings, hair follicles, and glands (sebaceous and sweat glands). This layer is essential for thermoregulation, sensation, and the overall health of the skin. The thickness of the dermis can vary depending on the area of the body, but it is consistently thicker than the epidermis, which is the outer layer of the skin. The other layers mentioned, such as the epidermis and the stratum corneum, are significantly thinner than the dermis. The epidermis is the outermost layer responsible for protection and is made up of several sub-layers, with the stratum corneum being the topmost layer of the epidermis composed of dead skin cells. The hypodermis, while it does provide insulation and connects the skin to underlying tissues, is primarily composed of fat and is also not as thick as the dermis. Understanding