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Take a postage stamp. Stick it to your arm. You've just covered 16 million cells, 55 hairs, 8 meters of nerves, 17,000 nerve endings, 5 meters of blood vessels, 500 sweat glands, and 83 oil glands. You've also just wasted 44 cents. Your skin is marvelously complex. It is your largest organ, accounting for 10% of your body's mass. It is also the site of 15 to 20 percent of all reported work-related illnesses according to the US Bureau of Labor Statistics. Skin can suffer direct, sensitizing, or systemic effects when exposed to hazardous chemicals. Direct exposure can corrode, irritate...

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