Eli5: if our bodies are able to form entire human beings from scratch, why can’t it grow back organs that have been amputated?
In: Biology
I heard a good analogy once:
Imagine a normal housefront that has a window and a door. Now smash in the window and break the door. Easy to fix, even though you’ve never seen the house before, yes? Just replace the window and fix the door.
Now get another house, smash in the whole wall so there’s nothing left but a gaping hole. Now order in a repair company and tell them to fix it as it were, but you don’t have any reference or pictures to show how it used to look.
All they can do is build a wall without any windows or doors to make the house liveable again, because they don’t know what it used to look like, where the door was or how many windows etc.
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