How many vertebrae compose the thoracic spine?

The thoracic spine is composed of 12 vertebrae, which are designated as T1 through T12. These vertebrae are located in the middle segment of the vertebral column, between the cervical (neck) and lumbar (lower back) regions. Each thoracic vertebra articulates with a pair of ribs, which adds to the structural support and stability of the thoracic region of the spine. Additionally, the thoracic spine plays a critical role in protecting vital organs within the thorax, including the heart and lungs, while also providing attachment points for muscles and ligaments that aid in upper body movement and posture. The specificity of 12 thoracic vertebrae is crucial for understanding spinal anatomy and diagnosing conditions that may affect this area of the back.