« previous next »
« previous next »
 

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

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.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Examples of cell-to-cell communication based on the distance between cells Examples of cell-to-cell communication based on the distance between cells
Brain cells of a laboratory mouse are shown glowing with multicolor fluorescent proteins Brain cells of a laboratory mouse are shown glowing with multicolor fluorescent proteins
blood cells in the artery blood cells in the artery
Blood Flow through the Heart Blood Flow through the Heart
White Blood Cells White Blood Cells
An electron micrograph of a synapse between two nerve cells. An electron micrograph of a synapse between two nerve cells.
Video: Passive Smoke Exposure

For a complete list of videos, visit our video library