Self Grown Organs Could a viable organ be partially grown in a test tube then be hooked up to the host in some way until it is large enough to swap it with the bad organ? For example: Could a smaller replacement heart have a tiny pacemaker to keep a separate heart rhythm and grown in a different part of the body cavity like the appendix? Then when the organ is mature, remove the organ from the appendix and then transplant to another person or on oneself?

> Could a viable organ be partially grown in a test tube then be hooked up to the host in some way until it is large enough to swap it with the bad organ?

Yes. This conceptual possibility already is a reality for one organ, namely the skin.

For an example see the following story in a good scientific journal: <

Unfortunately this doesn’t yet mean that conceptually homologous procedures could already be performed for most organs.