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Cyanide works by making the human body unable to use oxygen.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

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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.

A health history is essential in collecting subjective data about metabolic acidosis. A health history is essential in collecting subjective data about metabolic acidosis.
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