WEBVTT

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[MUSIC]

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Joan Cartan-Hansen, Host: Your
skin has over 5 million tiny

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nerve endings that together form
your sense of touch.

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There are actually 20 different
types of nerve endings in your

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skin, grouped into four main
categories.

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Mechanoreceptors.these help you
detect pressure, vibrations and

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texture.

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Thermoreceptors.there are two
kinds-- one type to detected hot

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and one type to detect cold.

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Pain receptors send an "ouch"
signal to your brain when you

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get a cut, scrape, burn or bug
bite.

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And proprioceptors. These nerve
endings help you sense the

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position of different parts of
the body in relation to each

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other and in relation to your
surroundings.

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You also have a second touch
system that helps you register

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emotional touches.

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When you get a friendly or
not-so-friendly touch, C-tactile

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fibers send signals to your
brain.

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And you register an emotion,
like happy or uncomfortable.

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These receptors help you
identify friends and potential

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enemies.

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Your skin and your sense of
touch keep you safe and in

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contact with the world.

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For more information about skin,
check out the science trek

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website.

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You'll find it at science trek
dot org.