How many vertebrae make up the thoracic region of the spine?

The thoracic region of the spine is composed of 12 vertebrae, which are designated as T1 through T12. This section of the spine is located between the cervical region (which has 7 vertebrae) and the lumbar region (which has 5 vertebrae). The thoracic vertebrae are unique because they are the only vertebrae that articulate with the ribs, providing both support and structural integrity to the thoracic cavity. This 12-vertebra framework allows for the attachment of the rib cage, which plays a crucial role in protecting vital organs such as the heart and lungs, while also enabling flexibility and a range of motion. Understanding the composition of the thoracic spine is fundamental in radiography, particularly when examining the spine for any abnormalities or injuries.