Which segment of the spine contains 12 vertebrae?

The segment of the spine that contains 12 vertebrae is the thoracic region. The thoracic spine is situated between the cervical spine, which has seven vertebrae, and the lumbar spine, consisting of five vertebrae. Each of the thoracic vertebrae (T1 to T12) is connected to a pair of ribs, playing a crucial role in protecting the heart and lungs while also providing structural support for the upper body. This segmentation allows for a moderate range of motion while maintaining stability, which is essential for activities such as breathing and upper body movements. Understanding the anatomy of the thoracic spine is fundamental in Pilates, as it informs the design of exercises that promote spinal alignment and mobility while considering the relationship of the thoracic spine to posture and overall body mechanics.