Everyone knows that removing an appendix is no big deal. Doctors don’t even know exactly what it does, and it occasionally becomes infected and inflamed, making it dangerous if not removed. Apart from the appendix, there are many other internal body parts we can all live without. You won’t have to be hooked up to a machine in a medical facility for the rest of your life. And living would be largely unrestrained.
You would think that if your body has two of something, it means you need the two. However, this is not necessarily true. The truth is, living with one lung, is not so much different from having two capable ones. Most would conclude that losing one of two lungs should cut respiratory capacity in half, but it doesn’t because the human body has substantial reserves. Someone who has a lung surgically removed actually retains between 70 to 80 percent of their respiratory function.
What happens is the surviving lung soon expands to compensate for its missing mate, and regular exercise speeds up the process. Strenuous activity might be more difficult, but ordinary exercise is not affected if one of these breathing organs is removed.