How many vertebrae are in the thoracic region of the human spine?

The thoracic region of the human spine consists of 12 vertebrae, which are labeled T1 through T12. These vertebrae are crucial as they serve to support the ribcage and protect the thoracic organs, including the heart and lungs. The structure of the thoracic vertebrae is designed to provide stability and the flexibility necessary for the ribcage during respiration. Additionally, these vertebrae articulate with the ribs, playing a significant role in the mechanics of breathing and protecting vital thoracic structures. Each thoracic vertebra has unique features, including costal facets for rib attachment, which distinguish them from cervical and lumbar vertebrae. Understanding the segments of the spine, including the thoracic region, helps in appreciating their anatomical roles and their relevance in biomechanics, injury prevention, and rehabilitation in fitness and health contexts.