What are the two major subdivisions of the skeleton?

• A. Axial skeleton
• B. Appendicular skeleton
• C. Axial skeleton and appendicular skeleton
• D. Skull and spine

Answer: (C)

Two major subdivisions divide the skeleton: the axial skeleton and the appendicular skeleton. The axial skeleton forms the central axis of the body and includes the skull, vertebral column, and rib cage. The appendicular skeleton consists of the limbs and the girdles that attach them to the trunk—the shoulder girdle and the pelvic girdle.

This distinction is useful because it groups bones by location and function: the axial skeleton protects and supports the brain, spinal cord, and thoracic organs, while the appendicular skeleton provides the framework for movement and interaction with the environment. The correct choice encompasses both subdivisions, giving a complete picture of the skeleton’s organization. Choices that mention only one subdivision or name specific bones like the skull and spine fail to reflect the full division of the skeleton.