A vertebra is a single element in the human spine, which consists of 33 individual bones. These bones are separated by discs and connected by facet joints to form the spinal column that supports the body's weight and allows for flexibility and movement. Each vertebra has several important features such as a large hole called the vertebral foramen, which protects the spinal cord; two pedicles, which connect each vertebra to its neighbors; and laminae, which form the arch of the back. The main function of the vertebrae is to provide support and protection for the spinal cord while also allowing a wide range of motion in various directions.