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Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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Everyone has one nostril that is larger than the other.

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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Cell-wall structure of Gram-positive and Gram-negative bacteria. Cell-wall structure of Gram-positive and Gram-negative bacteria.
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
Gram negative N. gonorrhoeae. Gram negative N. gonorrhoeae.
Control of thyroxine secretion through negative feedback. Control of thyroxine secretion through negative feedback.
Negative Feedback and Temperature Control Negative Feedback and Temperature Control
Video: Evolutionary tree of life Animation

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