T11 refers to the eleventh thoracic vertebra in the human spine, located in the middle back region. It is part of the thoracic spine, which consists of twelve vertebrae labeled T1 to T12. The T11 vertebra plays a crucial role in supporting the rib cage and protecting the spinal cord. In terms of anatomy, T11 connects with the ribs and provides attachment points for muscles and ligaments. Injuries or conditions affecting the T11 vertebra can lead to pain or mobility issues, highlighting its importance in overall spinal health and function.