|
|
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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%.
IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
![A noose hanging from a “Liberty Tree” reveals this artist’s bias: The “tar-and-feathering” of a Brit](https://biology-forums.com/gallery/47/medium_374628_15_08_15_11_50_52_222361412.jpeg)
![The Masses, a leading Socialist magazine, featured drawings by artists, including John Sloan, as wel](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_19_26_224531623.jpeg)