What is appendix?

Normally, the appendix sits in the lower right abdomen. The function of the appendix is unknown. One theory is that the appendix acts as a storehouse for good bacteria, “rebooting” the digestive system after diarrheal illnesses. Other experts believe the appendix is just a useless remnant from our evolutionary past. read more

© 2014 WebMD, LLC. All rights reserved. Prev Next Front View of the Appendix. The appendix sits at the junction of the small intestine and large intestine. It’s a thin tube about four inches long. Normally, the appendix sits in the lower right abdomen. The function of the appendix is unknown. read more

The appendix (or vermiform appendix; also cecal [or caecal] appendix; vermix; or vermiform process) is a blind-ended tube connected to the cecum, from which it develops in the embryo. The cecum is a pouchlike structure of the colon, located at the junction of the small and the large intestines. read more

Appendicitis, or inflammation of the appendix, has many different causes. Pain in the abdomen is the most common symptom of appendicitis, but you also may experience nausea, vomiting, constipation, and fever. Appendicitis is the most common reason for surgery due to acute abdominal pain. read more