1228-1500

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The human body is a complex and intricate machine, composed of numerous systems that work together to maintain life. The heart pumps blood through a network of veins and arteries, supplying oxygen and nutrients to every cell in the body. The brain controls movement and sensation, processing information from the senses and directing the body's responses. The lungs breathe air into the body, exchanging carbon dioxide for oxygen. The digestive system breaks down food into nutrients that can be absorbed by the body.