Chris meets surgeon Dr Ott, who has been using STEM cells to create a functioning lab-grown heart. Could this be a key to a longer life?

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Secrets of the Human Body (2017)
The human body is the most sophisticated organism on earth. It's a scientific marvel and much about it remains a mystery. Secrets of the Human Body uses cutting-edge graphics to effectively peel back the skin and reveal the surprisingly beautiful biological processes that keep us alive.

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