For example, the first rib attaches to the first thoracic vertebra (i.e. T-1); the 12th (last) rib attaches to the last vertebra of the thoracic spine (i.e., T-12). The thoracic spine serves many ...

Each vertebra is numbered and grouped into 5 regions. Diagram. There are 7 cervical vertebrae in the cervical region. There are 12 thoracic vertebrae in the thoracic region. There are 5 lumbar ...

Dogs have 13 paired ribs, numbered 1–13, which articulate with thoracic vertebra of the same number. The diaphragm arises from the ventral borders of the third and fourth lumbar vertebrae and ...