« previous next »
« previous next »
 

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Tracheid cells in xylem tissue. Tracheid cells in xylem tissue.
Muscle fibers consist of single, elongated, multinucleated cells that arise from the fusion Muscle fibers consist of single, elongated, multinucleated cells that arise from the fusion
BLOOD CELLS BLOOD CELLS
Time course for antibodies to the EBV viral–specific antigens. Time course for antibodies to the EBV viral–specific antigens.
ATP, an important energy currency in cells ATP, an important energy currency in cells
Video: Pressure volume relationships - Normal inspiration and expiration

For a complete list of videos, visit our video library