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The spinal cord is a long, thin, tubular bundle of nerves that is an extension of the central nervous system from the brain and is enclosed in and protected by the bony vertebral column.The main function of the spinal cord is transmission of neural inputs between the periphery and the brain.he spinal cord is the main pathway for information connecting the brain and peripheral nervous system. The length of the spinal cord is much shorter than the length of the bony spinal column.
Spinal cord. Dorsal root of nerve. Dorsal root ganglion. Ventral root of nerve. Nerve â periferal. Outside of spinal disc. Inside of spinal disc. Vertebra â the bony part of the spine.