<P> The eighth thoracic vertebra is, together with the ninth thoracic vertebra, at the same level as the xiphisternum . </P> <P> The thoracic spinal nerve 8 (T8) passes out underneath it . </P> <P> The ninth thoracic vertebra may have no demi - facets below . In some subjects however, it has two demi - facets on either side; when this occurs the tenth doesn't have facets but demi - facets at the upper part . </P> <P> The thoracic spinal nerve 9 (T9) passes out underneath it . </P>

Where does the rib connected to the thoracic vertebrae