Scientists have not been able to explain the role of the appendix in the human colon. Sometimes the appendix becomes acutely inflamed, leading to surgical resection. Therefore, scientists considered the appendix to be useless and superfluous. Researchers at Midwestern University in Arizona have concluded that it is an important organ in the human immune system.

To study appendicitis, Assistant Professor Heather Smith studied the intestines of 533 mammals and compared their natural properties. Humans such as apes and rabbits have appendicitis, while dogs and cats do not. They discovered that the appendix existed and evolved in different animal species at 30 different times and remained completely extinct during evolution.

As a result, more important elements of the immune system, called lymphoid cells, were present in the intestines of appendicitis animals. They grow bacteria that are beneficial to the human body, and these bacteria are stored in the appendix. As a result, beneficial bacteria are lost from the gut during diarrhea, while the appendix restores them immediately.

As a result, people with appendicitis have a slower recovery time after diarrhea. The average size of an adult appendix is ​​5-10 cm long and 6-8 mm in diameter. However, scientists are unable to explain why the organ becomes inflamed. Some speculate that this is due to a blocked mouth.