Side view of a normal spine

             Neck region has seven vertebrae (C1 through C7),
Thoracic region has 12 vertebrae (T1 through T12)
Lumbar region has five vertebrae (L1 through L5 and
Sacral region consists of five vertebrae, all fused together to form one continuous bone mass known as the sacrum.
Coccygeal region consists of four vertebrae, all fused together to form the coccyx or tailbone.        
                          

Top view of a lumbar vertebra.

Side view of a segment of three lumbar vertebrae