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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

A single crossover inserts F at a specific locus, which then determines the order of gene transfer A single crossover inserts F at a specific locus, which then determines the order of gene transfer
Anatomical Charts Muscular System Anatomical Charts Muscular System
Autonomic Nervous System Autonomic Nervous System
A typical port fuel-injection system squirts fuel into the low pressure (vacuum) of the intake ... A typical port fuel-injection system squirts fuel into the low pressure (vacuum) of the intake ...
A demand delivery system uses a fuel-pressure regulator attached to the fuel pump assembly inside ... A demand delivery system uses a fuel-pressure regulator attached to the fuel pump assembly inside ...
Specific Nutrients and Behaviors Are Important during the First Trimester Specific Nutrients and Behaviors Are Important during the First Trimester
Video: Natural Selection, Species Isolation and Real World Example

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