Most important part. of human.

I agree on that human's most important part is brain. Because our brain's power is unconceivable and infinite. Say, our brian is controlling everything we do actually, which works much faster than any computer. And it is said that it can process 100 trillion instructions per second. Brain tells us what to eat, how to consume ourselves in given circumstances, also, when we sleep, it will help us store the important memories and delete the unnecessary details. well, our brain emits huge power and energy to dominate our muscle, our body and our life, when we push it to the limits. We can't live without the core of our body.