header bg

Question:

In the human skeleton, which of the following lists some of the vertebrae in descending order?

A Atlas, axis, thoracic, lumbar, sacral, coccyx
Explaination

From highest to lowest, the atlas is cervical vertebra 1, supporting the skull; the axis is cervical vertebra 2; next come cervical vertebrae 3 through 7, the bones in the back of the neck, which are omitted in all choices; then the 12 thoracic vertebrae are the upper back bones; below these are the 5 lumbar vertebrae in the lower back; the 5 sacral vertebrae (together, the sacrum) are the pelvic and hip-level back bones; and the coccyx or tailbone at the bottom of the spine contains 305 small bones, which are often fused together.