Which is the proper sequence of steps in the healing of a fracture (the steps are listed below but are not in the correct sequence of events): 1. osteoblasts form trabecular bone that joins together the fractured ends of the bone and bony callus replaces fibrocartilage callus
2. bone remodeling occurs and compact bone replaces the spongy bone around the periphery of the fracture site
3. fibroblasts and chondrocytes from the periosteum form the fibrocartilage callus
4. a fracture hematoma forms and bone cells in the region of the fracture die
5. phagocytes and osteoclasts begin to remove the dead cells and damaged tissue around the hematoma