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| | II. Osteology. 3a. 2. The Thoracic Vertebræ. Gray, Henry. 1918. Anatomy of the Human Body. |
 | | The bodies in the middle of the thoracic region are heart-shaped, and as broad in the antero-posterior as in the transverse direction. |
 | | The transverse processes arise from the arch behind the superior articular processes and pedicles; they are thick, strong, and of considerable length, directed obliquely backward and lateralward, and each ends in a clubbed extremity, on the front of which is a small, concave surface, for articulation with the tubercle of a rib. |
 | | The First Thoracic Vertebra has, on either side of the body, an entire articular facet for the head of the first rib, and a demi-facet for the upper half of the head of the second rib. |
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