« previous next »
« previous next »
 

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

There are more bacteria in your mouth than there are people in the world.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

The path of light through the cornea, iris, lens, and striking the retina. The path of light through the cornea, iris, lens, and striking the retina.
A Layer Based on Electrical Properties: The Ionosphere A Layer Based on Electrical Properties: The Ionosphere
Permafrost: Top layer temperatures increased by as much as 3˚C Permafrost: Top layer temperatures increased by as much as 3˚C
Skin layer diagram Skin layer diagram
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 ...
The K–T Boundary Layer The K–T Boundary Layer
Video: Tuberculosis Testing

For a complete list of videos, visit our video library