Article - Appendix Isn't Useless at All
Article - Appendix Isn't Useless at All
Article - Appendix Isn't Useless at All
The abundance4 of evidence makes a strong case for the role of the appendix as a 4)
place where the good bacteria can live safe and undisturbed until they are needed,"
said William Parker, Ph.D., assistant professor of experimental surgery.
The appendix is a slender two- to four-inch pouch located near the juncture5 of the 5)
large and small intestines. While its exact function in humans has been debated by
physicians, it is known that there is immune system tissue in the appendix. The gut
is populated with different microbes that help the digestive system break down the
foods we eat. In return, the gut provides nourishment and safety to the bacteria
For the past ten years, Parker has been studying the interplay of these bacteria in 6)
the bowels, and in the process has documented the existence of a biofilm. This thin
and delicate layer is an amalgamation6 of microbes, mucus and molecules living
atop of the lining the intestines.
"Our studies have indicated that the immune system protects and nourishes the 7)
colonies of microbes living in the biofilm," Parkers explained. "By protecting these
good microbes, the harmful microbes have no place to locate. We have also shown
that biofilms are most pronounced in the appendix and their prevalence7 decreases
moving away from it."
"Diseases causing severe diarrhea are endemic8 in countries without modern health 8)
and sanitation practices, which often results in the entire contents of the bowels,
including the biofilms, being flushed from the body," Parker said. He added that the
appendix's location and position is such that it is expected to be relatively difficult for
anything to enter it as the contents of the bowels are emptied.
"Once the bowel contents have left the body, the good bacteria hidden away in the 9)
appendix can emerge and repopulate the lining of the intestine before more harmful
bacteria can take up residence," Parker continued. "In industrialized societies with
modern medical care and sanitation practices, the maintenance of a reserve of
beneficial bacteria may not be necessary. This is consistent with the observation
that removing the appendix in modern societies has no discernable9 negative
effects."
2. What is the CLAIM being made by researchers regarding the purpose of the appendix?