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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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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.

Self-sealing property Self-sealing property
During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage, During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage,
Decremental property of graded potentials. Decremental property of graded potentials.
Prestige can sometimes be converted into property. Shown here is “Snooki” Polizzi, a reality ... Prestige can sometimes be converted into property. Shown here is “Snooki” Polizzi, a reality ...
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How to add, subtract, multiply, and divide using the rules of significant digits (Part 1) How to add, subtract, multiply, and divide using the rules of significant digits (Part 1)
Video: Protein Structure - Primary, Secondary, Tertiary and Quaternary

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