The title is my question: what organs are absolutely needed (fatal if injured/re

Question

The title is my question: what organs are absolutely needed (fatal if injured/removed) by the human body and perhaps animals in general?

I'm not asking which organs are mechanically replaceable, but more what organs cannot be removed (and not replaced) in order to maintain human life.

To clarify the question, I'm wondering what organs when removed (and applied no medical intervention) would cause fatal effects in a short amount of time, or cause semi-fatal effects (ex. shortened lifespan). A list perhaps of importance, if possible, would be nice.

Explanation / Answer

You can't remove most organs. The heart, lungs and brain are the ones that without you'll die in seconds. The rest you'll live a few hours or more. All depends how long you wish to live. The best way to see which organs are most required is to look at the order organs are shut down when there isn't enough oxygen or blood. That tells you which area most and least important.

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