Appendix - Definition

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An appendix describes a portion of an organ which forms an extension of that organ. The most well-known appendix is the ileo-cecal appendix, attached to the human digestive system at the beginning of the large intestine. It measures between 2 and 5 inches long, is 5 mm in diameter on average, and is hollow. The appendix can be found in different areas of which the most frequent are post-cecal and pelvic. These anatomical variations are responsible for slight differences in symptoms when this organ becomes inflamed. This inflammation occurs due to an obstruction in the hollow part of the appendix: this is appendicitis which leads to an appendectomy.