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Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Cellular section from the brain of a person who died from Alzheimer's disease. Cellular section from the brain of a person who died from Alzheimer's disease.
The visual field as seen by a person with (a) glaucoma, (b) macular degeneration, and (c) cataracts. The visual field as seen by a person with (a) glaucoma, (b) macular degeneration, and (c) cataracts.
(A) Scratch test; patient is exposed to allergens through a light scratch on the skin; (B) Positive (A) Scratch test; patient is exposed to allergens through a light scratch on the skin; (B) Positive
James Madison was a key figure at the Constitutional Convention of 1787 in Philadelphia. He not only James Madison was a key figure at the Constitutional Convention of 1787 in Philadelphia. He not only
This Russian godfather is leaving a Moscow court just after he was acquitted of a double murder. Do ... This Russian godfather is leaving a Moscow court just after he was acquitted of a double murder. Do ...
Food security per person Food security per person
Video: Brain Anatomy Animation (Part 1 of 2)

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