What are the layers of the skin from the outermost to the innermost?

The correct answer is based on the structural organization of the skin, which is essential for understanding skin health and the effects of various cosmetology procedures.

The outermost layer of the skin is the epidermis, which serves as a protective barrier against environmental damage, pathogens, and water loss. It consists of several sublayers that help in the regeneration of skin cells.

Beneath the epidermis lies the dermis, which is significantly thicker and contains connective tissues, blood vessels, hair follicles, sweat and sebaceous glands, and sensory receptors. This layer is crucial for providing support and nourishment to the epidermis through its blood supply and plays an important role in thermoregulation and sensation.

Now, the deepest layer is the subcutaneous layer (also known as the hypodermis), which is not technically part of the skin itself but connects the skin to underlying tissues such as muscles and bones. It consists mainly of loose connective tissue and fat, serving as a cushion and energy reserve, as well as helping to insulate the body.

This specific order, from the outermost epidermis to the innermost subcutaneous layer, is foundational knowledge in cosmetology, as it influences how products are applied and how various treatments can impact the skin layers