Is it always scar tissue and it just blends in better or does the body sometimes grow skin?
In: Biology
Some animals regrow whole body parts, but somewhere in our ancestry, the adaptation of scarring provided a survival benefit (faster and less resource-intensive healing) and we’ve been stuck with it ever since. The mechanisms for regrowth still exist, and sometimes they do work in limited ways (IIRC kids can regrow lost fingertips, for instance), and there’s research into how they can be activated for bigger injuries.
Latest Answers