What are the three layers of skin?

The correct answer identifies the three primary layers of the skin: the dermis, epidermis, and subcutaneous layer.

The epidermis is the outermost layer of skin, providing a protective barrier and playing a crucial role in preventing water loss and protecting against environmental hazards. It consists of several sub-layers and is primarily made up of keratinocytes, which produce keratin, a protein that contributes to the skin’s strength and protective properties.

Beneath the epidermis lies the dermis, which is significantly thicker and contains connective tissues, blood vessels, nerve endings, and hair follicles. This layer is important for cushioning the body from stress and strain, supporting the skin's structure, and regulating temperature through its vascular network.

The subcutaneous layer, also known as the hypodermis, is the deepest layer of the skin that provides insulation and padding for the body. It anchors the skin to underlying structures such as muscles and bones and consists mainly of fat and connective tissue.

Recognizing these three layers is essential for understanding various aspects of skin health, injury, and the overall physiological functions of the integumentary system.