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The atmosphere consists of a mixture of gases and particles, including oxygen, nitrogen, hydrogen, CO2, water vapor, and dust.
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The average human body contains trillions of microorganisms — outnumbering human cells by 10 to 1. Because of their small size, however, microorganisms make up only about 1 to 3 percent of the body's mass (in a 200-pound adult, that's 2 to 6 pounds of bacteria), but play a vital role in human health.
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B.) Confirm if more advanced medical personnel have been called.
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