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Almost all researchers and health-care professionals will agree that removing the appendix will not cause any bad reactions or side effects in your body. However not everyone agrees on the actual function of the appendix. Some call it a vestigial organ which is an organ that has no use. Evolutionists believe that vestigial organs are proof of evolution as they are "organs" that were used in lesser evolved beings and as the being evolved the "part" lost its purpose but is still there. However there are some researchers out there that are considering the fact that the appendix plays a role in immunity (which is what protects us from germs). It has not been completely proved yet and is still a theory.
In other animal species whose appendix is larger than the humans it is an active part of the digestive system.
In a recent study, researchers at Duke University Medical Center, USA, said Appendix serves as protection of body against of harmful germs and protect the saprophytic bacterial flora (which is found normally in the digestive tract). Until now most doctors and scientists believe that the appendix is an organ that has not a very precise role, being practically useless.
After closing the study, researchers concluded that saprophytic bacteria in the appendix, which help to digest food, can survive after an episode of diarrhea, that almost totally cleans intestine, favoring its repopulation with saprophytic bacteria, following diarrhea episode.
Appendix is located in the place where the small intestine joins the large intestine, is mobile and has a length of 3-5 cm. It's role was the subject of scientific community debate for many years. It was recently demonstrated the presence of lymphoid tissue at this level.A variety of bacteria that help the digestive system to digest food is present at this level. The gut rewards those bacteria through the food made available and protection against harmful factors. Researchers believe that immune system cells located in the Appendix have a protective function for the saprophytic bacteria.
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