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Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

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There are more bacteria in your mouth than there are people in the world.

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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

The pituitary gland lies just underneath the brain. It is subdivided into anterior and posterior lob The pituitary gland lies just underneath the brain. It is subdivided into anterior and posterior lob
The S-curve in the human vertebral column--a result of the evolution of bipedality--makes humans hig The S-curve in the human vertebral column--a result of the evolution of bipedality--makes humans hig
Hormones Secreted by the Adrenal Glands Hormones Secreted by the Adrenal Glands
Methyl group metabolism and homocystinuria Methyl group metabolism and homocystinuria
Average Annual Growth Rates of Population by Country Group Average Annual Growth Rates of Population by Country Group
Pain rating intensity scale Pain rating intensity scale
Video: Chemical Synapse Animation

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