« previous next »
« previous next »
 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

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

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

The theoretical design of nature reserves, based on the tenets of island biogeography. The theoretical design of nature reserves, based on the tenets of island biogeography.
External View of the Right Eye External View of the Right Eye
Front view of the cranium and facial bones. Front view of the cranium and facial bones.
Cross-section view of the human eye. Cross-section view of the human eye.
Type of pathogen organism Type of pathogen organism
The Muscular System (Posterior View) The Muscular System (Posterior View)
Video: Interview with Person having Obsessive Compulsive Disorder

For a complete list of videos, visit our video library