The Brain.

The brain is the biggest working organ in the body. However, even the smallest bit of damage that happens the brain could kill you. The brain controls the WHOLE body,if something small happens it could kill you and your whole body. Nerves and and grooves run through your brain to make you do everything you do. When you run, when you sing,when you smile, when you have a headache, when you think, when you swim. The nerves and muscles that make you do that also send a message up to your brain to make you move and act.