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| | II. Osteology. 3. The Vertebral Column. Gray, Henry. 1918. Anatomy of the Human Body. |
 | | The vertebral column is a flexuous and flexible column, formed of a series of bones called vertebræ. |
 | | The vertebræ are thirty-three in number, and are grouped under the names cervical, thoracic, lumbar, sacral, and coccygeal, according to the regions they occupy; there are seven in the cervical region, twelve in the thoracic, five in the lumbar, five in the sacral, and four in the coccygeal. |
 | | With the exception of the first and second cervical, the true or movable vertebræ present certain common characteristics which are best studied by examining one from the middle of the thoracic region. |
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