The backbone is the number one support for your body. The bones stacked on top of each other are called vertebrae and the spinal cord runs through them. The bones help protect the spinal cord. The vertebral column is made up of 33 bones called vertebrae. Seven vertebrae are in the neck region called Cervical Vertebrae denoted as C1, C2,C7, twelve in the thorax also called thoracic vertebrae and denoted as T1- T12 or D1-D12 and five in the lumbar region, L1- L5. There are five vertebrae in the sacral region (S1-S5) and remaining four are fused together as a vestigial organ, to remind us that our ancestors had tails. The spinal cord is a part of your nervous system. It is like a telephone wire that goes from your brain to the middle of your back, to your hips.
It divides into many nerves as it moves down, like wires of a telephone cable and carries messages from the brain to the various parts of the body and back