Heart muscle cells (shown in green), regress to a more youthful state after injury, start dividing again (indicated by a red marker) to replenish lost cells and then mature a second time into cardiomyocytes.
Credit: Dr. Juan Carlos Izpisúa Belmonte, Salk Institute for Biological Studies
(Source: popsci.com)
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Call me picky, but brain cells look cooler and the heart in its entirety looks cooler. dafuqamitalkingabout?
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