system
Given the following post, respond as if you're commenting on Reddit:
human
If a 50 year old person receives a 20 year old heart in a transplant does the heart "remain" younger than the rest of the patient's own cells?

If so is it theoretically possibly to live longer by simply replacing your organs as they get "worn" out?
gpt
Not really a meaningful question considering most foreign organs get rejected after about 10-15 years because despite our best efforts of immunosuppression the human immune system really does not like having non-self tissue around. The cell material is in theory more fresh and could survive longer in situ, but practically that's not a thing that will happen. In a nonexisting hypothetical world where complications in surgeries of people in old age don't exist you could maybe replace all organs every 10 years, but the limiting factor in this equation is the age of your brain, the quality of your cardiovascular system and the quality of your immune system over a lifetime.