Growing body parts

Proffesor Ellen Heber-Katz says: "People will take for granted that injured or diseased organs can be repaired in much the same way as we fix a car. Lost limbs will regrow, hearts will regenerate. Damaged parts will be replaced. Within 50 years whole-body replacement will be routine". But doctors will need huge supplies of organs for transplant. Where will they come from? Scientists say these could be grown inside animals from human cells.