Why Can't Humans Regrow Body Parts?

Humans can't regrow body parts because our bodies don’t have a special button like some animals do, and that’s why we need doctors to help us heal.

Imagine you're playing with your favorite building blocks, and you knock one tower down. You might not be able to build it back up in seconds, but if you take your time, you can fix it again. That's kind of how healing works. When we get a cut or break a bone, our body sends repair teams (like tiny workers) to fix the damage little by little.

Some animals, like starfish and lizards, have a special way of fixing themselves, they’re like superheroes with a "reset button." If they lose a leg or arm, their body knows how to start over from scratch in that spot. It's like if you spilled your juice box and it instantly refilled itself.

Humans are more like regular kids who need time and help to fix things, that’s why we can’t regrow whole arms or legs as easily as some animals do.