I don’t know, Henry, I think a pig’s heart is used because its close similarity in size and strength with the human. I don’t know how similar a sheep’s heart is to ours.
Possibly, the cells and structure of pigs tissue is similar to that of human, which is why that is used more commonly.. I don’t know if the sheep’s heart would be of suitable size or use for a human.. Maybe we could manipulate it somehow to give it a bit more capacity and strength! Then theres the issue of it being ‘accepted’ into the human body… Lots to consider!
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