The human liver can completely regenerate even after a large portion of the tissue is removed.
Why it is true
It is the only internal organ in the human body with this extraordinary ability. As long as at least 25 percent of healthy liver tissue remains, the organ can return to its original size in a few weeks.
Source: MIT
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Related facts
The liver is the only human internal organ capable of completely regenerating itself, even if it loses up to seventy-five percent of its mass.
The human liver can regenerate to its original size from just twenty-five percent of its tissue.
The human liver can regenerate even if it loses a large part.
The human liver can regenerate even after losing a large portion of its tissue.