Which of the following represents the correct vertebral formula for an adult human?
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Correct answer: C7 T12 L5 S1 Co1
The human vertebral column is formed by 26 serially arranged units. While the sacral (S) and coccygeal (Co) vertebrae are fused in adults into single units, the formula is expressed as C7 (cervical), T12 (thoracic), L5 (lumbar), S1 (sacral-fused), and Co1 (coccygeal-fused).
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