Skin is the covering, or integument, of the body’s surface that both provides protection and receives sensory stimuli from the external environment. The skin consists of three layers of tissue:
The epidermis, an outermost layer that contains the primary protective structure the stratum corneum.
The dermis, a fibrous layer that supports and strengthens the epidermis.
The hypodermis or subcutis, a subcutaneous layer of fat beneath the dermis that supplies nutrients to the other two layers and that cushions and insulates the body. (source: Encyclopaedia Britannica).