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spinal column
| Term | Definition |
|---|---|
| cervical | Neck region. There are seven cervical vertebrae (C1 to C7) |
| thoracic | Chest region. There are 12 thoracic vertebrae (T1 to T12). Each bone is joined to a rib |
| lumbar | Loin (waist) or flank region (between the ribs and the hip bone). There are five lumbar vertebrae (L1 to L5) |
| sacral | Five bones (S1 to S5) are fused to form one bone, the sacrum |
| coccygeal | The coccyx (tailbone) is a small bone composed of four fused pieces |