this post was submitted on 21 Oct 2023
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Why pig hearts? Is it just a size issue?
Pig organs are approximately the same size and configuration as human ones. They also share a very similar immune system and biochemistry. We also have experience breeding and genetically modifying them. This makes them the easiest option to modify for human use. Still not easy, but easiest.
The pig is the result of a lot of selective breeding. It's pure fluke that it matches well enough to use their organs. The wild boar is the ancestor of the pig, and it's less suited to organ use.
Technically the wild boar and the pig have the same ancestors but we changed the environment for the pig and bread selectively while the environment of the wild boar only changed slightly so natural selection probably didn't need to change as much as we did to the pig to be adapted to the environmental changes of today.