« previous next »
« previous next »
 

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

The environmental policy changes over time The environmental policy changes over time
Carrots are a good source of vitamin A Carrots are a good source of vitamin A
Too Much Alcohol Costs You Good Nutrition Too Much Alcohol Costs You Good Nutrition
Life Expectancy in Developing Countries Life Expectancy in Developing Countries
Developing Child, The Developing Child, The
Walking into new year kids drawing Walking into new year kids drawing
Video: Structures that affect circulation - kidneys, blood volume and venous tone

For a complete list of videos, visit our video library