What does the appendicular skeleton refer to?

The appendicular skeleton refers to the parts of the skeleton that are involved in limb movement and support. This includes the bones of the arms and legs, as well as the bones that attach them to the trunk, namely the shoulder girdle and pelvis. The primary function of the appendicular skeleton is to facilitate movement and allow for a wide range of motions necessary for physical activities.

In contrast, other choices describe components of the axial skeleton, which consists of the bones that form the central axis of the body, including the skull, vertebral column, and ribs. Understanding the distinction between the appendicular and axial skeleton is essential in anatomy and fitness training, as it emphasizes how different parts of the body work together for mobility and support.