Which is not involved in the process of bone repair following a fracture?
A. A fibrocartilaginous callus serves as a model for new bone growth.
B. The fracture hematoma reorganizes to form a procallus.
C. Osteoclasts remove excess bone from the hard callus.
D. Fibroblasts produce collagen fibers to connect broken pieces of bone.
E. No exceptions; all of the choices are involved in the process of bone repair.
Answer: E
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