The vertebral column, or spine, typically consists of 33 vertebrae in total. These are divided into five regions: 7 cervical, 12 thoracic, 5 lumbar, 5 sacral (fused), and 4 coccygeal (fused). In adults, the sacral and coccygeal vertebrae are often fused, resulting in a total of 24 distinct vertebrae in the movable sections of the spine.
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