If most organ cells, like in the liver, are replaced every three years or so, why isn’t a transplant eventually accepted by the new body?

Question

If most organ cells, like in the liver, are replaced every three years or so, why isn’t a transplant eventually accepted by the new body?

In: 350

Answer 1

Any replaced cells in a transplant organ are made by the foreign organ, not your own body. So they are just as rejectable as the original cells.

[I hadn’t ever heard the 3-year thing before, but even assuming it is true, it doesn’t really help at all here for the reason I just stated.]