« previous next »
« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

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

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Skin of an African (left) and Asian (right) elephant. Skin of an African (left) and Asian (right) elephant.
Common skin signs are often evidence of an illness or disorder. A wheal is a localized, evanescent ... Common skin signs are often evidence of an illness or disorder. A wheal is a localized, evanescent ...
Photo of a sign taken at an emissions test facility. Photo of a sign taken at an emissions test facility.
Induration measurement in a tuberculin skin test, a type IV hypersensitivity. Induration measurement in a tuberculin skin test, a type IV hypersensitivity.
Skin lifting techniques. (A) Basic skin lifting. (B) Lifting with directional shift. (C) Skin ... Skin lifting techniques. (A) Basic skin lifting. (B) Lifting with directional shift. (C) Skin ...
Pin the skin and subcutaneous fascia on a spot on the back using the thumb of one hand; place the ... Pin the skin and subcutaneous fascia on a spot on the back using the thumb of one hand; place the ...
Video: Medullary osmotic gradient: countercurrent multiplier, urea recycling & vasa recta countercurrent exchange

For a complete list of videos, visit our video library