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Did you know?
All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
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There are 60,000 miles of blood vessels in every adult human.
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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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There are 20 feet of blood vessels in each square inch of human skin.