How many fused vertebrae comprise the coccyx?

The coccyx, commonly known as the tailbone, is formed by the fusion of four vertebrae. This coccygeal structure typically consists of several segments that fuse together during development, resulting in a single, solid bone by adulthood. The four fused vertebrae of the coccyx serve multiple functions, including providing attachment points for various muscles, tendons, and ligaments, and playing a role in weight-bearing when a person is seated. Understanding the anatomy of the coccyx is fundamental in orthopedic contexts, particularly when addressing issues related to trauma, pain, or surgery in that area. The other options do not reflect the typical anatomy of the coccyx in humans, as it is well-established that there are four fused vertebrae in this particular region of the spine.