The appendicular skeleton includes all of the following EXCEPT one. Which one?

Correct Answer: B

Rationale: Appendicular skeleton includes pectoral girdle, phalanges, and lower limbs. Thoracic cage (ribs, sternum) is axial. Answer is B, per the document.

Correct Answer: A

Rationale: Osteocytes are mature bone cells in lacunae of compact bone, derived from osteoblasts. Osteons are structures, not cells. Answer is A, per the document.

Correct Answer: A

Rationale: Haemopoiesis occurs in red marrow (active), found in medullary cavities and epiphyses, not yellow marrow (inactive) or cartilage plates. Answer is A, per the document.

Correct Answer: C

Rationale: Synovial joints have a fluid-filled cavity (synovial fluid), not discs in all, and aren’t amphiarthroses or cartilaginous. Answer is C, per the document.

Correct Answer: D

Rationale: Blood cell formation (haemopoiesis) occurs in red marrow, active in flat bones and long bone ends. Blood, endosteum, and canals don’t produce cells. Answer is D, per the document.