« previous next »
« previous next »
 

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Proteins that facilitate the formation and movement of a replication fork Proteins that facilitate the formation and movement of a replication fork
Movement and Space Movement and Space
The age-dependent curve of salivary progresterone levels in three populations. The age-dependent curve of salivary progresterone levels in three populations.
Oxygen dissociation curve Oxygen dissociation curve
Circular petrissage to forehead. Use the thumbs moving in counterclockwise circles. The movement is ... Circular petrissage to forehead. Use the thumbs moving in counterclockwise circles. The movement is ...
Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia). Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia).
Video: Introduction to Human Immunodeficiency Virus (HIV)

For a complete list of videos, visit our video library