Which skin layer is also referred to as the true skin?

The term "true skin" refers specifically to the dermis layer of the skin. The dermis lies beneath the epidermis and is composed of connective tissue, blood vessels, nerve endings, and various skin structures such as hair follicles and sweat glands. It serves several vital functions, including providing strength and elasticity to the skin through collagen and elastin fibers, as well as supporting the epidermis and supplying it with oxygen and nutrients via the blood vessels.

In contrast, the stratum corneum is the outermost layer of the epidermis, primarily composed of dead skin cells that provide a protective barrier. The stratum spinosum is one of the deeper layers of the epidermis, which plays a role in skin strength and flexibility. The epidermis as a whole is the topmost layer of skin and functions mainly as a protective shield against environmental factors but does not encompass the underlying supportive structures that characterize the dermis. This is why the dermis is referred to as the "true skin," highlighting its foundational role in maintaining skin health and function.