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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.

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Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

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The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Vesalius’s De Humani Corporis Fabrica was an important early work on the human species. Vesalius’s De Humani Corporis Fabrica was an important early work on the human species.
Anatomically modern humans left archaeological clues, including evidence of burials, which indicate Anatomically modern humans left archaeological clues, including evidence of burials, which indicate
Early instructions for administration of the small pox vaccine. Early instructions for administration of the small pox vaccine.
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Hydrolysis reactions for some biochemically important phosphate compounds (part 2) Hydrolysis reactions for some biochemically important phosphate compounds (part 2)
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Video: Simple Diffusion - gases and nonpolar compounds transport

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