Kit Pile

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The human body is a complex and highly organized system composed of trillions of cells that work together to maintain life. These cells are specialized into different types, each performing specific functions such as nerve cells transmitting signals, muscle cells contracting to move the body, and blood cells transporting oxygen throughout the body. The nervous system, which includes the brain, spinal cord, and nerves, plays a critical role in controlling the body's functions by sending and receiving signals.