« previous next »
« previous next »
 

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?

Illicit drug use costs the United States approximately $181 billion every year.

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Image was downloaded from the Jet Propulsion Laboratory web site Image was downloaded from the Jet Propulsion Laboratory web site
Amazing NASA Pictures Collection Amazing NASA Pictures Collection
Amazing NASA Pictures Collection Amazing NASA Pictures Collection
This image shows the spread of droplets from an uncovered sneeze. This image shows the spread of droplets from an uncovered sneeze.
(A) Alternating thumb petrissage to paraspinal muscles from sacrum to shoulder. Search for areas of ... (A) Alternating thumb petrissage to paraspinal muscles from sacrum to shoulder. Search for areas of ...
Online Course Icon Online Course Icon
Video: Cellular defenses (natural killer cells, phagocyte types & process of phagocytosis)

For a complete list of videos, visit our video library