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The Acidic Stomach Your stomach contains hydrochloric acid which is so powerful that it can dissolve metals like zinc or even a razor blade this acid is essential for digesting tough foods and killing harmful bacteria but why doesnt it dissolve the stomach itself the secret lies in the protective mucous lining the inner wall of the stomach constantly produces a thick layer of mucus that acts as an acid proof shield additionally the cells lining the stomach regenerate very quickly replacing the entire inner layer every few days so the acid never gets a chance to cause damage

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The Electric Brain Your brain is a real power plant of electricity billions of neurons in your brain are constantly exchanging electrical and chemical messages so you can think move and feel interestingly a human brain in an awake state produces about twelve to twenty five watts of electricity while this might not seem like much it is enough to power a low wattage LED light bulb your brain is the fastest processor in the world performing heavy tasks that even the most powerful supercomputers cannot handle all your memories and thoughts are actually these delicate electrical signals moving through your neural networks

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The Tireless Heart Your heart is the strongest muscle in your body and it never rests for even a single second from before birth until the end of life this amazing pump beats about one hundred thousand times a day and circulates over seven thousand liters of blood through your body the amazing fact is that your heart produces enough energy every day to drive a truck for thirty two kilometers even more interestingly the heart has its own electrical system and can continue to beat even if separated from the body as long as it has enough oxygen this means you have a dedicated and permanent power plant inside you

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The Secret of Red Blood Our blood gets its bright red color from a protein called hemoglobin which is found in red blood cells hemoglobin contains iron and its main job is to carry oxygen throughout the body when oxygen binds to the iron in hemoglobin it undergoes a chemical reaction that reflects light in a way that appears bright red to our eyes even though your veins might look blue through your skin your blood is always red it just turns a darker shade of red when it loses oxygen on its way back to the heart

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