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Did you know?

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

Did you know?

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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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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Blood is approximately twice as thick as water because of the cells and other components found in it.

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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Mendel's analyses of single-factor crosses Mendel's analyses of single-factor crosses
Stained section of cerebral cortex from autopsy of a patient with Creutzfeldt-Jakob disease Stained section of cerebral cortex from autopsy of a patient with Creutzfeldt-Jakob disease
Bird Smoking Bird Smoking
PET scan of the brain in a patient with Alzheimer’s disease. PET scan of the brain in a patient with Alzheimer’s disease.
RH Factor in Pregnancy RH Factor in Pregnancy
Role of Ras protein in a central growth factor activation pathway Role of Ras protein in a central growth factor activation pathway
Video: DNA close up Animation

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