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What defines a bundle of axons that runs up and down the back, and is covered and protected by the vertebrae?

Respuesta :

Answer:

Spinal cord

Explanation:

Spinal Cord. The spinal cord is a thick bundle of nerves that come away from the brain stem. It runs down the spine. Sensations received by nerves out in the PNS are relayed to the spinal cord and then transferred to brain

Spinal cord as it is :)