AFAIK it all boils down to the fact that during embryonal development our cells, which at that point were just a blob of undifferentiated autonomous chemical machines, somehow managed to unanimously agree upon the cardinal directions (up-down, left-right, front-back) for future development - and thanks to this, we don’t have toes growing out of our ears.
It’s not that incredible, considering we can get cysts full of teeth and hair inside the body
How do I unread this
Oh yes, teratomes are not fun. But thankfully they are comparably rare.
Imagine if you suddenly sprouted a tumor with functional tastebuds in your colon
“So what brings you into the doctors office today?”
“Well for some reason everything I eat ends up tasting like shit.”
Wonder if we could use that phenomena to regenerate teeth in a lab for replacements and dentures.
Probably no different than stem cell stuff