Question: is it possible to have two hearts and how will it improve life and performence?
Asked by rafi8
to Audra, Fiona, Gavin, Justin, Steve on 13 Mar 2012. This question was also asked by shania, bean101, y09hunter, reekzstar, loccstar98, thompsonfenwick1, maggot12, 10cuemilyw.
Keywords: cardiovascular, heart, performance
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