Artificially grown kidney. Source
UC scientists have finally grown a functional kidney in the laboratory that can be transplanted into animals. This kidney was created by scrubbing away all of the cells from a real kidney, leaving only the kidney scaffold, and then growing new cells onto the empty scaffold. While this kidney isn't as efficient as a real kidney, it is still a big step forward in regenerative medicine. There is a very good chance that these technologies will be applicable to humans in many of our lifetimes.
For more information, check out this article.
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