Which of the following is NOT a region of the vertebral column?

The scapula is not a region of the vertebral column; rather, it is a bone that forms part of the shoulder girdle. In the context of the vertebral column, which is composed of different regions, the other options represent specific parts of this structure.

The coccyx refers to the small, triangular bone at the lower end of the vertebral column, commonly known as the tailbone. The sacrum is a large, triangular bone formed by the fusion of several vertebrae that connects the spine to the pelvis. The thoracic region is one of the main sections of the vertebral column, comprising twelve vertebrae that are located in the middle of the back.

Understanding these distinctions is crucial when studying human anatomy, particularly in recognizing how various structures are categorized within the skeletal system. The scapula's role in the body is significantly different, contributing to the arm's mobility rather than the spine's support and structure.