system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do broken bones heal?
gpt
Bone healing occurs in three stages. The first is the inflammation stage, where clot forms between the fracture. The next is the repairing stage, where the clot is replaced with cartilaginous and fibrous tissues to stabilize the fracture, which are then gradually replaced by  bony tissue to form an immature spongy bone mortar. The final stage is the remodeling stage, where the marginal spongy bone is replaced with the harder compact bone, leaving the bone basically as good as it was before fracture.