Q: Given a scientific passage and an answer, generate a question for the given answer.
Passage: The Appendicular Skeleton The appendicular skeleton includes all bones of the upper and lower limbs, plus the bones that attach each limb to the axial skeleton. There are 126 bones in the appendicular skeleton of an adult. The bones of the appendicular skeleton are covered in a separate chapter. Answer: axial skeleton
A:
The appendicular skeleton includes all bones of the upper and lower limbs, plus the bones that attach each limb to the what?