The human body has 33 vertebrae that extend from the base of the skull to the tailbone.
Care technique: Stretch regularly

Shock absorbers known as disks are located between vertebrae.
Care technique: Strengthen (i.e., core exercises)

The vertebrae form a double-S, reverse curve to ensure proper balance and weight bearing.
Care technique: Execute proper bending and lifting techniques to reduce stress

If your vertebrae were placed directly on top of one another, the back would be only 5% as strong as it is. One step would produce enough trauma and brain jolt to cause a concussion.
Care technique: Sit for no longer than 30 minutes. Stand to release spine pressure.