Boy

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The human body is a complex system that is made up of many different organs and systems working together to keep it alive. The brain is the control center of the body, where all decisions are made. It is protected by the skull, which also houses the eyes, ears, nose, and mouth. The heart pumps blood throughout the body, supplying oxygen and nutrients to all cells. Breathing is controlled by the lungs, which expand and contract to take in air. The digestive system breaks down food into nutrients that can be absorbed by the body.