Which two layers make up the skin?

The skin is primarily composed of two main layers: the epidermis and the dermis. The epidermis is the outermost layer, serving as a protective barrier that is essential for preventing water loss and shielding underlying tissues from environmental factors such as pathogens and UV radiation. It is primarily made up of keratinized stratified squamous epithelium and contains melanocytes and other types of cells that contribute to skin color and protection.

Beneath the epidermis lies the dermis, which is thicker and provides structural support to the skin. The dermis contains connective tissues, blood vessels, nerve endings, sweat glands, sebaceous glands, and hair follicles. It plays a crucial role in thermoregulation, sensation, and the overall health of the skin.

The other provided options refer to layers not accurately representing the main constituents of the skin. The hypodermis, while associated with the skin, is not classified as a layer of the skin itself but rather as a subcutaneous tissue that provides insulation and cushioning. 'Outer and inner layers' and 'subcutaneous and epidermal layers' are terms that do not precisely describe the anatomical layers of the skin in the context of its structure. Thus, the accurate identification of the skin's primary