Question

Which five vertebrae are fused in adult human to form one vertebra?

1 point

25 to 31

24 to 28

20 to 25

25 to 29​

Answer 1

Lumbar: 5. Sacral: 5 (fused into one bone, the sacrum) Coccygeal: 4 (fused into one or two bones, the coccyx) As a whole, the vertebral column from sacrum to skull is equivalent to a joint with three degrees of freedom35 in the directions of flexion and extension, right and left lateral flexion, and axial rotation.