[su_column center=”yes”] What is the appendix? Appendix is a tubular organ attached to the first part of the large intestine called cecum. It lies in the right lower quadrant of the abdomen. The appendix is called a “vestigial” organ as it does not serve any useful function in the body. It can vary in its length from around 3cm to over 10 cm. In the centre of the appendix is a find lumen that is connected with the cecum. Normally, the lumen is only wide enough to admit a matchstick.[/su_column]