The backbone spinal column is composed of 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 fused sacral vertebrae and 3 to 4 fused coccygeal segments.
La columna vertebral consiste en 7 vértebras cervicales, 12 torácicas, 5 lumbares, 5 sacras fusionadas entre sí y 3 a 4 segmentos coccígeos fusionados.