One heck of a unique Mother's Day card. You got your mitochondria from your mother in the egg cell from which you came. Mitochondria have their own DNA which can be used to trace your mother's mother's mother's mother's mother back through thousands of years. Thanks, Mom.
decellularized "Ghost" Heart The cells are removed by a chemical process, leaving only Extracellular matrix, so the new cells of the transplantee, which match the DNA, can be grown on this heart, so the rejection of the organ doesn't happen. It's still in the experimental stage, but it is promising.