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Our lungs inhale over two million liters of air every day, without even thinking. The surface area of the lungs is approximately the same size as a tennis court. Nearly all boys grow at least as tall as their mothers.
By the age of 75, the average American has created about 110,000 pounds of garbage. It takes the interaction of 72 different muscles to produce human speech. During a 24-hour period, the average human will breathe 23,040 times. |