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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

16 weeks old human fetus 16 weeks old human fetus
24 weeks old human fetus 24 weeks old human fetus
Fetus at 9 weeks’ gestation. Fetus at 9 weeks’ gestation.
A demand delivery system uses a fuel-pressure regulator attached to the fuel pump assembly inside ... A demand delivery system uses a fuel-pressure regulator attached to the fuel pump assembly inside ...
Meiosis involves two complete divisional operations forming four potential sex cells. Meiosis involves two complete divisional operations forming four potential sex cells.
Video: How do the different types of chromatography work? (No Audio)

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