« previous next »
« previous next »
 

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Federal vs state govenment Federal vs state govenment
In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai
Prentice Hall's Federal Taxation 2014 Corporations, Partnerships, Estates & Trusts, 27th ... Prentice Hall's Federal Taxation 2014 Corporations, Partnerships, Estates & Trusts, 27th ...
Circuits Circuits
Gene circuits Gene circuits
The two circuits of the human cardiovascular system The two circuits of the human cardiovascular system
Video: Definition of heart rate

For a complete list of videos, visit our video library