« previous next »
« previous next »
 

Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Summary of events in the killing of virus-infected cells by cytotoxic T cells. Summary of events in the killing of virus-infected cells by cytotoxic T cells.
Biology joke: virus and retrovirus Biology joke: virus and retrovirus
Phagocytosis of an antibody-bound virus by a macrophage Phagocytosis of an antibody-bound virus by a macrophage
hepatitis virus hepatitis virus
Structure of human immunodeficiency virus Structure of human immunodeficiency virus
Infected Tobacco Leaves by a Virus Infected Tobacco Leaves by a Virus
Video: Nerve Impulse Transmission Animation

For a complete list of videos, visit our video library