The integumentary system (skin), is the largest organ in the human body.
It is 15 percent of our body weight, each inch of our skin contains 15 feet of blood vessels, 12 feet of nerves, 650 sweat glands, and 100 oil glands, 65 hairs and 1,300 nerve endings.
Healthy skin is somewhat acidic, moist, soft, and smooth. It is thickest on the palms of the hands and on the soles of the feet, it is thinnest on the eyelids.
Skin's primary functions are: protection, sensation, heat regulation, excretion, secretion, and absorption.