Ivy Tech APHY 101 – Skeletal System Practice Test

The main idea here is how bones are grouped into axial versus appendicular skeletons. The skull is part of the axial skeleton because it sits along the body's central axis and protects the brain while supporting the sensory organs. The axial skeleton also includes the vertebral column and the rib cage, forming the central framework.

In contrast, the clavicle, pelvic girdle, and femur are part of the appendicular skeleton, which covers the limbs and the girdles that attach them to the trunk, enabling movement. So the skull fits the axial group, while the others belong to the appendicular group.