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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
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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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There are more bacteria in your mouth than there are people in the world.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").