Hiigaran Scout

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The human body is made up of approximately 37 trillion cells that work together to keep us alive and functioning properly. The brain, which controls all functions of the body, is made up of billions of tiny nerve cells called neurons that communicate with each other through electrical impulses and chemical signals. The heart beats around 3 billion times in a lifetime, pumping over 1 million barrels of blood, which is enough to fill 200 train tank cars.