Question

fill in the blank question
the 　　　　　　 　　　　　　 contains a bundle of neurons that leaves the brain and runs down the length of the back.
need help? review these concept resources.
hear about the concept

Explanation:

In the nervous system, the spinal cord is the structure that contains a bundle of neurons (nerve fibers) extending from the brain down the back. It's a key part of the central nervous system, responsible for transmitting signals between the brain and the body.

Answer:

spinal cord