The human body is a remarkable thing. In fact, the brain acts like a central communication depot, processing millions of messages every second. These messages, relayed as electrical impulses, are sent out over nerves the way phone calls travel along telephone wires. A thick braid formed by billions of these nerves is attached to the brain and extends down from the base of the skull. This is the spinal cord.
Smaller braids branch off from the cord.
These braids divide again and again into tiny nerve fibers and fill the entire body, going to each cell, organ and tissue. Every human being has an estimated 15 billion nerve cells. All send and receive messages as nerve impulses through the spinal cord. It's clear that the brain and spinal cord are critical to the survival and health of the individual. Protecting them is absolutely vital.