anthony atala is doing something that was once pure fantasy -- growing human body parts right in the>> one of the strategies we use is to take a very small piece of tissue, less than half the size of a postage stamp, you can grow those cells outside the body and we use those cells to three-dimensionally reconstruct the tissue of interest. >> the next thing we're going to do is store your stem cells. >> remember those stem cells that i had stored? well, if i'm ever in need of an organ, they might just come in handy. >> a stem cell has the ability to become many other cell types. a heart cell or a liver cell. >> kidney cells, bladder cells, skin cells, heart cells, lung cells. you name it. >> so one cell becomes a universal donor. >> next step, engineering the body part. in one of dr. atala's latest breakthroughs in organ engineering is truly groundbreaking. printing. yes, printing body parts. >> the first printer we used was actually typical desktop printer. and instead of using ink, we would just use cells. >> miraculously, using that modified inkjet printer, the same one you might h

anthony atala is doing something that was once pure fantasy -- growing human body parts right in the one of the strategies we use is to take a very small piece of tissue, less than half the size of a postage stamp, you can grow those cells outside the body and we use those cells to three-dimensionally reconstruct the tissue of interest. >> the next thing we're going to do is store your stem cells. >> remember those stem cells that i had stored? well, if i'm ever in need of an organ, they might just come in handy. >> a stem cell has the ability to become many other cell types. a heart cell or a liver cell. >> kidney cells, bladder cells, skin cells, heart cells, lung cells. you name it. >> so one cell becomes a universal donor. >> next step, engineering the body part. in one of dr. atala's latest breakthroughs in organ engineering is truly groundbreaking. printing. yes, printing body parts. >> the first printer we used was actually typical desktop printer. and instead of using ink, we would just use cells. >> miraculously, using that modified inkjet printer, the same one you might hav