The appendix is a pouch-shaped organ connected to the large intestine on the lower right-hand side of your abdomen. An obstruction in the appendix can lead to its inflammation and infection; a condition commonly referred to as appendicitis. The blockage may be due to accumulation of mucus, parasites or fecal matter.
The appendix, despite from being a part of the gastrointestinal tract, is a vestigial organ. This implies that it is not responsible for any vital function in the body, and an individual can lead a completely healthy life even without it.