Bill Nye: The Science Guy

Season 1 Episode 4

Skin

1
Aired Unknown Oct 01, 1993 on Disney Channel
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Skin
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Learning about skin science is no sweat.
It's gigantic. It's gargantuan. It's your skin. It's your body's biggest organ. If you could lay your skin out
flat, it would cover about one and a half square meters. Your skin stops you from drying out, protects you
from the weather, and keeps bacteria and viruses from getting inside your body.
Your skin is also your personal air conditioner and heater all in one. Sweating cools you off. When you're
hot, glands in your skin push a mixture of water and other chemicals onto the surface of your skin. When
the water evaporates, it takes some of the heat with it, and you're cooler. When you're too cold, your skin
muscles start twitching. Shivering makes your body warm up.
Without skin, you wouldn't be able to feel the difference between a sheet of paper and a wool blanket.
There are thousands of touch receptors inside skin. When you touch the remote control, the receptors
send information about the remote's temperature, thickness, and feel of the buttons to your brain. Your
brain makes decisions about what to do with the remote control. But here's hoping your brain would never
tell you to turn the channel while the Skin show is on...right?

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