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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.
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