How do the lumbar vertebrae differ from cervical vertebrae?

The lumbar vertebrae are identified by their larger body size as compared to cervical vertebrae because they are designed to support more weight. The lumbar region of the spine is located in the lower back and bears the load of the upper body during various activities, such as lifting and bending. This anatomical feature provides increased stability and strength needed for weight-bearing tasks.

In contrast, the cervical vertebrae, located in the neck region, are smaller and lighter, allowing for greater mobility and a wider range of motion, particularly in rotation and flexion/extension. They are specifically designed for flexibility and head movement rather than for supporting significant weight. The spacing between lumbar vertebrae is also generally greater when considering their load-bearing requirements compared to the cervical vertebrae. Additionally, lumbar vertebrae are not fused together; they remain separate, allowing for some degree of movement within the region while permitting the necessary support.