Which Bone Does Not Belong to the Appendicular Skeleton

Question

Which bone does not belong to the appendicular skeleton?
A)Femur
B)Sacrum
C)Calcaneus
D)Clavicle
E)Ulna

Accepted Answer

The sacrum is part of the axial skeleton, which supports the central axis of the body and includes the skull, vertebral column, and rib cage. The femur, calcaneus, clavicle, and ulna are all part of the appendicular skeleton, which includes the bones of the limbs and the girdles (pelvic and pectoral) that attach them to the axial skeleton.