Imagine the implications if we could regenerate damaged, aging or diseased body parts grown from our own cells custom made, and genetically indistinguishable from our own. Could it eliminate the death sentence for profound birth defects, the need for prosthetics and any shortage of transplant organs? EXPLORER delves into the science of tissue engineering and shows how scientists are beginning to harness the body's natural powers to grow skin, muscle, body parts and vital organs, even hearts