One of the bones that form the spine is known as a VERTEBRA. A VERTEBRA is a small bone that makes up the spinal column, which is a series of bones that protect the spinal cord and provide support for the body. The vertebrae are connected to each other by ligaments and muscles, allowing for movement and flexibility. There are 33 vertebrae in the human spine, divided into five sections: cervical, thoracic, lumbar, sacral, and coccygeal.