The spine ___1___ a column of bony blocks or vertebrae, ___2___ by elastic discs with jelly-like centers and supported by ligaments, tendons and muscles. The ___3___ cord, a cable of nerves ___4___ messages from your brain to your muscles and sensation back to the brain, ___5___ down the spine.
...2...
separating
separates
separated
to be separated