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The human body is a remarkable machine that functions with precision and ease. The heart beats approximately 100,000 times per day, pumping blood through over 60,000 miles of blood vessels. The brain processes information at an astonishing rate, performing billions of calculations every second. The lungs breathe in oxygen and exhale carbon dioxide, replenishing the body's supply of energy. Despite its complexity, the human body is a finely tuned instrument that operates with remarkable efficiency.