spinal cord
US /ˈspaɪ.nəl ˌkɔːrd/
UK /ˈspaɪ.nəl ˌkɔːrd/
1.
the cylindrical bundle of nerve fibers and associated tissue that is enclosed in the spine and connects nearly all parts of the body to the brain, with which it forms the central nervous system.
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Damage to the spinal cord can result in paralysis.
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The brain sends signals down the spinal cord to the muscles.