« previous next »
« previous next »
 

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

During their annual migration, the entire population of Arctic terns move from the Arctic Ocean in t During their annual migration, the entire population of Arctic terns move from the Arctic Ocean in t
Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater, Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,
Population Pyramids Population Pyramids
Population size Population size
Poverty and population growth Poverty and population growth
The relationship between allelic frequency and genotypic frequency in a population that is in Hardy- The relationship between allelic frequency and genotypic frequency in a population that is in Hardy-
Video: Five phases of cardiac cycle & Atrial contraction

For a complete list of videos, visit our video library