« previous next »
« previous next »
 

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Food web associated with algal turf during the summer in the Eel River, California. Food web associated with algal turf during the summer in the Eel River, California.
Selected Vitamins: Food Sources, Functions, and Deficiency and Toxicity Symptoms Selected Vitamins: Food Sources, Functions, and Deficiency and Toxicity Symptoms
Air masses interact to produce weather Air masses interact to produce weather
Mix Up Your Choices within Each Food Group Mix Up Your Choices within Each Food Group
A 40.0-kg crate is being raised by means of a rope. Its upward acceleration is 2.00 m/s2. What ... A 40.0-kg crate is being raised by means of a rope. Its upward acceleration is 2.00 m/s2. What ...
Floral components. Anthers produce pollen and ovules produce eggs. Floral components. Anthers produce pollen and ovules produce eggs.
Video: Acids and bases - definition

For a complete list of videos, visit our video library