« previous next »
« previous next »
 

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

A study by Seehausen and van Alphen involving the effects of male coloration on female choice in Afr A study by Seehausen and van Alphen involving the effects of male coloration on female choice in Afr
Sexual and asexual reproductive cells of fungi. Sexual and asexual reproductive cells of fungi.
Normal male karyotype Normal male karyotype
Mataphase chromosomes Mataphase chromosomes
A reciprocal translocation involving the long arms of chromosomes A reciprocal translocation involving the long arms of chromosomes
Human chromosomes as seen at metaphase of mitosis in the scanning electron microscope. The replicate Human chromosomes as seen at metaphase of mitosis in the scanning electron microscope. The replicate
Video: Ventilation - phases and driving forces

For a complete list of videos, visit our video library