Which vertebral region contains 12 vertebrae?

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Multiple Choice

Which vertebral region contains 12 vertebrae?

Explanation:
The number of vertebrae in each region is a defining feature. The thoracic region has twelve vertebrae, which is why it’s the region referenced here. These vertebrae lie in the mid-back and each one typically articulates with a pair of ribs, giving the thoracic spine its rib-associated facets. In contrast, the cervical region has seven vertebrae and the lumbar region has five, while the sacral region is formed by five vertebrae that fuse to become the sacrum (the coccygeal segments are separate and also fused). So the region with twelve vertebrae is the thoracic region.

The number of vertebrae in each region is a defining feature. The thoracic region has twelve vertebrae, which is why it’s the region referenced here. These vertebrae lie in the mid-back and each one typically articulates with a pair of ribs, giving the thoracic spine its rib-associated facets. In contrast, the cervical region has seven vertebrae and the lumbar region has five, while the sacral region is formed by five vertebrae that fuse to become the sacrum (the coccygeal segments are separate and also fused). So the region with twelve vertebrae is the thoracic region.

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