There are five major spine areas:
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- Cervical spine: Has 7 vertebrae known as C1-C7.
- Thoracic spine: Has 12 vertebrae known as T1-T12.
- Lumbar spine: Has five vertebrae known as L1-L5.
- Sacral spine: Has five fused vertebrae known as the sacrum.
- Coccygeal spine: Has four fused vertebrae known as the coccyx.