Vertebrae are the small, bony segments that make up the spine, which is a crucial part of the human skeleton. Each vertebra is stacked on top of another, forming a flexible column that supports the body and protects the spinal cord. The spine is divided into different regions, including the cervical, thoracic, and lumbar areas, each serving specific functions. These bones allow for movement and flexibility while also providing stability. The vertebrae have unique shapes and sizes, depending on their location in the spine. Together, they play a vital role in maintaining posture and enabling activities like bending and twisting.