Adult stem cells can divide or self-renew indefinitely. This means they can generate various cell types from the originating organ or even regenerate the original organ, entirely. However, stem cells can be difficult to find. They can stay non-dividing and non-specific for years until the body summons them to repair or grow new tissue. This division and regeneration are how a skin wound heals, or how an organ such as the liver, for example, can repair itself after damage.