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Printing a human kidney - Anthony Atala

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Surgeon Anthony Atala demonstrates an early-stage experiment that could someday solve the organ-donor problem: a 3D printer that uses living cells to output a transplantable kidney. Using similar technology, Dr. Atala's young patient Luke Massella received an engineered bladder 10 years ago; we meet him onstage.

Explain why some cells, like liver, nerve, and pancreatic cells, are impossible to grow still today.

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