Which is the most important organ of a human being?

The brain. It is the center. Without it telling all the organs what to do everything would shut down. Your heart wouldn't beat, your body wouldn't breathe, etc... The brain must work for the remainder of the body to do so. Of course it is all interconnected as you stated but it all begins with the impulses sent out from the brain whether voluntary or involuntary everything starts there.

Hi, all parts of body are equally important for me.

sorry, maybe your classification about human organ is not right, according to your request, we can't make a good choice, maybe I think we must classify necessary human organ (brain, heart, stomach etc, without this, we will lose our life) and unnecessary human organ (hand, eye, nose or mouth etc, we can still survive even with withou this organ). we should make our decision from unnecessary human organ... if this, for me, I will choose eyes for my important organ, I think, I don't want to live a totally dark life without any light...it will make me crazy... thanks and happy mylotting.

Hi hireshd, Well, i can't choose which part because for me all parts of our human body are so important.Good luck!