<P> In vertebrates , thoracic vertebrae compose the middle segment of the vertebral column , between the cervical vertebrae and the lumbar vertebrae . In humans , there are twelve thoracic vertebrae and they are intermediate in size between the cervical and lumbar vertebrae ; they increase in size going towards the lumbar vertebrae , with the lower ones being a lot larger than the upper . They are distinguished by the presence of facets on the sides of the bodies for articulation with the heads of the ribs , as well as facets on the transverse processes of all , except the eleventh and twelfth , for articulation with the tubercles of the ribs . By convention , the human thoracic vertebrae are numbered T1 -- T12 , with the first one ( T1 ) located closest to the skull and the others going down the spine toward the lumbar region . </P>
<P> In vertebrates , thoracic vertebrae compose the middle segment of the vertebral column , between the cervical vertebrae and the lumbar vertebrae . In humans , there are twelve thoracic vertebrae and they are intermediate in size between the cervical and lumbar vertebrae ; they increase in size going towards the lumbar vertebrae , with the lower ones being a lot larger than the upper . They are distinguished by the presence of facets on the sides of the bodies for articulation with the heads of the ribs , as well as facets on the transverse processes of all , except the eleventh and twelfth , for articulation with the tubercles of the ribs . By convention , the human thoracic vertebrae are numbered T1 -- T12 , with the first one ( T1 ) located closest to the skull and the others going down the spine toward the lumbar region . </P>
where is t1 and t2 located on the spine
where is t1 and t2 located on the spine
closest to the skull
closest to the skull