Using animals to grow human body parts has been done, but how about using a live sheep for dialysis? The idea comes from one design student Revital Cohen. The project she's calling 'Life Support' seeks to use a sheep whose genome has been spliced with a human to produce human blood. The transgenic sheep then becomes a dialysis machine for diabetes patients, filtering their blood as it frolics in pastures during the day, then gets needles shoved in its head each night.