« previous next »
« previous next »
 

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

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?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

A hypothesis that suggests an explanation of the function of the gene that is defective in patients A hypothesis that suggests an explanation of the function of the gene that is defective in patients
Parasitic members of the supergroup Excavata. Parasitic members of the supergroup Excavata.
The three dimensions of stream structure. The three dimensions of stream structure.
Muscle structure seen at the EM level Muscle structure seen at the EM level
Periodic Function Periodic Function
How reciprocal functions compare to the parent function How reciprocal functions compare to the parent function
Video: Polymerase chain reaction PCR - Animation

For a complete list of videos, visit our video library