The L2 vertebra is the second lumbar vertebra in the lower back, part of the lumbar spine, which consists of five vertebrae labeled L1 to L5. It is located between the L1 vertebra and the L3 vertebra. The lumbar vertebrae are larger and stronger than those in the cervical and thoracic regions, as they bear more weight and provide support for the upper body. The L2 vertebra plays a crucial role in protecting the spinal cord and providing attachment points for muscles and ligaments. It helps facilitate movement and flexibility in the lower back while maintaining stability. Issues with the L2 vertebra can lead to pain or discomfort in the lower back and legs.