It is protected by the vertebral column, a series of bones that surround and support it. In the cervical region, the spinal cord contains nerves that control movement and sensation in the arms, legs ...

In amphibians, the pelvic girdle is attached to one vertebra. In the early reptiles, the pelvic girdle broadened its attachment to the vertebral column. Two vertebrae are used to support the pelvic ...

variation along the tail. At the base (proximal to the body), the vertebral column is formed by separated and well-defined vertebral units that allow active control of the tail. Caudally ...