« previous next »
« previous next »
 

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

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?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

The three stages of cell signalling: receptor activation, signal transduction, and a cellular respon The three stages of cell signalling: receptor activation, signal transduction, and a cellular respon
Water and salt regulation by isosmotic, hyperosmotic, and hypoosmotic aquatic organisms. Water and salt regulation by isosmotic, hyperosmotic, and hypoosmotic aquatic organisms.
Animal Cell Diagram Animal Cell Diagram
sperm cell sperm cell
The Concept of Water Balance The Concept of Water Balance
Hydrozoan. Hydra, a freshwater species capturing and digesting a water flea. Hydrozoan. Hydra, a freshwater species capturing and digesting a water flea.
Video: Acid-base imbalances - respiratory acidosis and alkalosis

For a complete list of videos, visit our video library