« previous next »
« previous next »
 

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.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

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

Some amazing roles of water in biology Some amazing roles of water in biology
The roles of transpiration, cohesion, adhesion, and tension in long-distance water transport. The roles of transpiration, cohesion, adhesion, and tension in long-distance water transport.
Safe and effective interpersonal communication Safe and effective interpersonal communication
The roles of chloride channels in inhibitory synapses. The roles of chloride channels in inhibitory synapses.
During their elderly years, men and women continue to exhibit aspects of the gender roles that they ... During their elderly years, men and women continue to exhibit aspects of the gender roles that they ...
Major biosynthetic roles of some citric acid cycle intermediates Major biosynthetic roles of some citric acid cycle intermediates
Video: Studying the Left and Right Brain Independently

For a complete list of videos, visit our video library