How Does the Human Body Stay Alive
"The human body is a self-sustaining system of interconnected parts, all working together to maintain the balance we call life."From the rhythmic pumping of your heart to the electrical signals in your brain, every system works to maintain homeostasis—the stable internal environment your cells need to survive. The cardiovascular system delivers oxygen and nutrients; the respiratory system brings in air and expels carbon dioxide; the digestive system breaks food into fuel; the endocrine and nervous systems act as command centers. Meanwhile, the immune system defends against threats, and the…
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