Your liver can regrow lost tissue, which is unusual among the body's internal organs.

The longer version

Regeneration in the liver works differently from repair in most other organs. Instead of replacing lost tissue with scar material, the remaining cells re-enter the cell cycle and divide until much of the original mass is restored. The organ is built to handle this because it constantly processes absorbed chemicals and needs working tissue rather than inert filler.

Blood flow through the liver adjusts while the volume is reduced, and growth signals appear to track the organ's size against the body's needs. The process has limits, though: repeated or long-lasting damage eventually leaves scar tissue behind and the regrown structure becomes less orderly.

Where this entry sits

These facts look at how the human body works in ordinary moments, from breathing and blinking to balance and sleep. They focus on anatomy, senses, and small reactions that happen constantly without any conscious effort. The full list sits on the Human Body page, where every entry is listed in order.