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The human body is a complex and intricate machine. It's made up of billions of cells that work together to keep us alive. Every single one of these cells has its own job to do, from nerve cells that send signals to muscle cells that help us move. The heart beats around 100,000 times per day, pumping blood through veins and arteries that stretch for miles. And yet, despite all this complexity, the human body is able to perform incredible feats of strength and agility. We can run marathons, lift heavy weights, and even dance on stage in front of thousands of people. It's truly a remarkable thing.