Purpose of Appendix Believed Found

CambodiaSam sent in this story, which opens: "Some scientists think they have figured out the real job of the troublesome and seemingly useless appendix: It produces and protects good germs for your gut. That's the theory from surgeons and immunologists at Duke University Medical School, published online in a scientific journal this week. For generations the appendix has been dismissed as superfluous. Doctors figured it had no function. Surgeons removed them routinely. People live fine without them. The function of the appendix seems related to the massive amount of bacteria populating the human digestive system, according to the study in the Journal of Theoretical Biology. There are more bacteria than human cells in the typical body. Most are good and help digest food. But sometimes the flora of bacteria in the intestines die or are purged. Diseases such as cholera or amoebic dysentery would clear the gut of useful bacteria. The appendix's job is to reboot the digestive system in that case."

Comments

Re:Polio, Asthma & Allergies

[paleo2002]

I have studied (some) biology, especially from an evolutionary perspective. There are aspects of our immune system that deal with macroscopic threats - parasites, foreign bodies, etc. In modern, industrialized society intestinal parasites and unremoved splinters aren't really a problem so a part of our immune system is left with very little to do. Like a bored child or pet, our immune system goes looking for something to do. It overreacts to pollen, proteins in common foods, and animal dander.

With the proliferation of antibacterial products, I worry about two things. In the short term, what kind of new allergies will people develop as chemistry continues to replace people's immune systems? In the long term, what kind of backlash are we going to see when microbes begin to develop some sort of resistance to alcohol and other antibacterial agents?

"produces"

[Gothmolly]

Just like leaving meat out in the sun "produces" flies? Didn't we sort all this out back in the 17th century or whatever? Oh wait, its CNN, that paragon of quality journalism.