1. Appendix testis, a vestigial remnant of the Müllerian duct; Epiploic Appendix, one of several small pouches of fat on the peritoneum along the colon and rectum Appendix of the laryngeal ventricle, a sac that extends from the laryngeal ventricle; MesoAppendix, the portion of the mesentery that connects the ileum to the vermiform Appendix