Facts about skin

Facts about skin If skin is severely damaged then it may try to heal by forming scar tissue. Scar tissue is not the same as normal skin tissue, it often appears discoloured and lacks sweat glands and hair. The colour of human skin depends on the amount of pigment melanin that the body produces. Small amounts of melanin result in light skin while large amounts of melanin, result in dark skin. When you’re feeling hot your skin sweats. As the sweats evaporates, it cools your body off. Fingernails and hair are made of a substance called keratin. The only part of the hair and nail that’s alive and is the part growing under the skin. This explains why it doesn't hurt to cut your hair or nails. A large amount of the dust in your home is actually dead skin.