Fibrous appendix of the liver, a band on the left of the liver.

In anatomy, a section at the end of an organ; in particular the:

Appendix, from the Latin word of the same name, may refer to an Index / Bibliography.

Vermiform appendix (often referred to as simply the "appendix"), a part of the human digestive system.

Right auricular appendix, a conical pouch on the right atrium of the heart.

Left auricular appendix, a conical pouch on the left atrium of the heart.

Appendix of the epididymis, a detached efferent duct of the epididymis.

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.

Appendix (law), an addition or addendum to a contract