How does the sense of touch work?
by 
Shadowb170
ANSWERS: 1
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"Your skin contains more than 4 million sensory receptors [mechanoreceptors] that are especially concentrated in the fingers, tongue, and lips. These nerve endings are sensitive to touch, pressure, temperature [thermoreceptors], and pain [pain receptors]. They gather sensory information and relay it through specific nerve bundles back to the central nervous system for processing and possible reaction. For instance, when you accidentally touch something hot, sensory responses in your fingertips travel quickly back to the brain, which immediately coordinates the protective response that makes you withdraw your hand in a hurry!" (source http://kidshealth.org/parent/general/body_basics/brain_nervous_system_p4.html)
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