Science fiction is moving toward science fact in University of Michigan labs as researchers make advances in bioengineered heart muscle (BEHM). The artificial tissue may one day replace parts of damaged hearts or be used to grow complete hearts for transplants. Currently, the tissue looks like real heart muscles but only contracts with about half the force. Experiments with the BEHM have included transplanting it into rats that have suffered heart attacks to study if the new tissue can heal damage.
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