The skin is the largest organ of the body, with a total area of about 20
square feet. The skin protects us from microbes and the elements, helps
regulate body temperature, and permits the sensations of touch, heat, and
Skin has three layers:
- The epidermis, the outermost layer of skin, provides a waterproof barrier
and creates our skin tone.
- The dermis, beneath the epidermis, contains tough connective tissue, hair
follicles, and sweat glands.
- The deeper subcutaneous tissue (hypodermis) is made of fat and connective
The skin’s color is created by special cells called melanocytes, which
produce the pigment melanin. Melanocytes are located in the epidermis.