Skeletal System: Bones, Joints, Cartilage · NCERT Biology

Which of the following represents the correct vertebral formula for an adult human?

  1. C7 T12 L5 S1 Co1
  2. C7 T10 L5 S5 Co4
  3. C5 T12 L7 S5 Co4
  4. C7 T12 L5 S5 Co4
Show answer and explanation

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).

Difficulty: Medium Question 13 of 20

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