Definition
The appendix is a small, finger-like pouch attached to the cecum, the beginning of the large intestine. It's considered a vestigial organ, meaning it doesn't have a significant function in modern humans. Think of it like an evolutionary leftover. It's a narrow, worm-shaped tube. Inflammation of the appendix is called appendicitis, which requires immediate medical attention. While seemingly useless, some studies suggest it might have a role in gut bacteria storage.