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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Male reproductive anatomy model Male reproductive anatomy model
Anthropologist Andrea Wiley (left) investigates the effects of high-altitude living on reproductive Anthropologist Andrea Wiley (left) investigates the effects of high-altitude living on reproductive
Herbert Spencer (1820–1903), sometimes called the second founder of sociology, coined the term ... Herbert Spencer (1820–1903), sometimes called the second founder of sociology, coined the term ...
The development of the internal ducts of the male and female reproductive systems from the Wolffian ... The development of the internal ducts of the male and female reproductive systems from the Wolffian ...
Main body cavities that hold human organs Main body cavities that hold human organs
Binary fission, the reproductive mode of bacteria and archaea Binary fission, the reproductive mode of bacteria and archaea
Video: ADH and the arterioles, kidneys, sweat glands and the Atrial natriuretic peptide (ANP)

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