1. Do you know that the skin is the largest organ of your body, weighing an average of 4 kilograms and covering an area of 2 meters2?
2. Do you know that the average person's skin renews itself every 28 days?
3. Do you know that each square inch of human skin consists of 19 million cells, 60 hairs, 90 oil glands, 19 feet of blood vessels, 625 sweat glands, and 19,000 sensory cells?
4. Do you know that people of different races and skin color have about the same number of melanocytes (cells that produce the skin's pigment melanin)? Skin color depends on how much or how little melanin each melanocyte produces.
5. Do you know that scalp hairs grow at a rate of 1 cm per month?
6. Do you know that nails are considered appendages (extensions) of your skin?
7. Do you know that it takes a nail 6 months to grow from base to tip?
8. Do you know that "goose bumps" are cause by contraction of an arrector pili
muscle connected to each hair follicle, which also causes hair to stand on end?
9. Do you know that the average scalp has 100,000 hairs?
10. Do you know that you shed 50 -100 hairs from your head each day?
11. Do you know that you have harmless bacteria normally living on your skin (called normal skin flora) that actually protect you by competing with harmful bacteria?
12. Do you know that sweat from your apocrine glands (located mainly in the underarm and genital areas) is odorless, and body odor actually results from the action of your skin's normal bacteria on the sweat?
13. Do you know that human skin has about 100,000 bacteria per square centimeter, and that 10 percent of human dry weight is attributed to bacteria?
14. Do you know that your eyelashes and eyebrows shield the eyes from sun, dust, and perspiration, and that nose hairs protect you from inhaling dust and other foreign bodies?
15. Do you know that the changing colors of a bruise are due to the breakdown of escaped red blood cells by your body's white blood cells?
16. Do you know that your nails are like a "diary" and can reveal that you had an illness several months ago?
17. Do you know that poison ivy is a member of the same family that includes poison sumac, cashews, mangos, lacquer, and ginkgo trees? All of these can give you a skin rash!