« previous next »
« previous next »
 

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

The peptidoglycan layer of Gram-positive bacteria The peptidoglycan layer of Gram-positive bacteria
Permafrost: Top layer temperatures increased by as much as 3˚C Permafrost: Top layer temperatures increased by as much as 3˚C
The Subcutaneous Layer The Subcutaneous Layer
As shown in the figure, a large open tank contains a layer of oil ( density 450 kg/m3) floating ... As shown in the figure, a large open tank contains a layer of oil ( density 450 kg/m3) floating ...
Mucus and Cilia: Physical Barriers Mucus and Cilia: Physical Barriers
Didinium, a barrel-shaped ciliate with tufts of cilia, catching (left) and engulfing (right) Paramec Didinium, a barrel-shaped ciliate with tufts of cilia, catching (left) and engulfing (right) Paramec
Video: Negative Feedback Regulation of Blood Pressure

For a complete list of videos, visit our video library