« previous next »
« previous next »
 

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Early divisions in the animal phylogeny. Early divisions in the animal phylogeny.
The Pantanal, Brazil, seen here in flood condition, is a critical jaguar range area. The Pantanal, Brazil, seen here in flood condition, is a critical jaguar range area.
By distancing themselves from the social reformers, early American sociologists ignored female ... By distancing themselves from the social reformers, early American sociologists ignored female ...
The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ... The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ...
Complete the following production chart and plot the points. Complete the following production chart and plot the points.
Stages of mitosis - Telophase Stages of mitosis - Telophase
Video: Definition of heart rate

For a complete list of videos, visit our video library