The spinal cord's outer section is made up of _____ and the inner section is made up of _____.

The _____ part of the spinal cord transmits messages to and from the brain. The _____ part controls life-saving reflexes.

A team of researchers is working on a new procedure that could result in the regrowth of neurons in the spinal cord. With which part of the nervous system is the team most concerned?

The spinal cord's outer section is made up of _____ and the inner section is made up of _____.