No one would argue that a starfish or a goldfish represents a pictue of superiority, but when it comes to the regenerative process, they have us beat. A starfish can regrow an arm if one is cut off. If the optical nerve of a goldfish is damaged the goldfish will generate a new working nerve.
Things are not as simple for humans when it comes to the regenerative process. This week on Science on the Radio, Dr. Marvin Druger talks about the human body and it's ability to heal wounds.