system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can't the brain and spine heal like other body parts?
gpt
The brain can and does try to repair itself. Brains form scar tissue. Unfortunately, it's so complex that basic natural healing can't do much.


The spine can and does try to repair itself. Spine bones often do repair nicely. Unfortunately, the nerves running throughout are so complex that basic natural healing can't do much.