How can a liver grow back from just a quarter of itself?

Cut away most of a liver and it rebuilds itself - the only organ inside you that can.

Remove up to three quarters of the liver and the cells that remain start dividing, growing the organ back to its full working size within weeks. It restores the mass, not the original shape, then stops once it is big enough.

This is why a living person can donate part of their liver: both the donor's piece and the patient's new one grow back to a full-size liver in a couple of months.

The liver can regrow to full size from a fraction of itself, which is why partial-liver donations work.

It is the reason living-donor liver transplants exist and can save someone's life.

Liver = the lego organ: lose most of the blocks, the rest rebuild it back to full.

Learn the idea and practice English at the same time.