system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Where do the extra bits of root go when baby teeth are pushed out?

A question from my 5 year old, who hath a looth tooth.
gpt
As the adult tooth develops beneath the baby tooth, it signals the body to resorb (eat) the roots of the baby teeth. So while baby teeth do start off with fully-formed baby-tooth roots, they get shorter and shorter as the adult tooth grows, which is why the baby teeth start wiggling in the first place.

So there are no extra bits, they are resorbed over time.