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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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There are more bacteria in your mouth than there are people in the world.

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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

The path of sound waves through the outer, middle, and inner ear. The path of sound waves through the outer, middle, and inner ear.
Functional MRI Scans These scans of human brains show localized average increases in neural activity Functional MRI Scans These scans of human brains show localized average increases in neural activity
Physical and Perceptual Dimensions of Sound Waves Physical and Perceptual Dimensions of Sound Waves
Subtle Differences in Written Words Subtle Differences in Written Words
Syntax Allows Us to Understand Language by the Organization of the Words Syntax Allows Us to Understand Language by the Organization of the Words
Children can fast map the meanings of words in a single exposure. Children can fast map the meanings of words in a single exposure.
Video: Cardiac Cycle (Part 2 of 4)

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