Which human organ can regrow itself after part of it is removed?

Hints

It's not the skin.
It's the largest internal organ in the body.
It filters toxins from your blood, including alcohol.

Reveal the answer

Answer: The liver

Also accepted: Liver, liver, Human liver

The liver is the only internal organ that can regenerate. Even if up to 70% of it is removed, the remaining part can grow back to nearly full size within a few months. This is why living people can donate part of their liver: both the donor's and the recipient's portions regrow into fully working livers.

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