Appendix (anatomy) (nonfiction)

The appendix (or vermiform appendix; also cecal [or caecal] appendix; vermix; or vermiform process) is a finger-like, blind-ended tube connected to the cecum, from which it develops in the embryo. The cecum is a pouchlike structure of the colon, located at the junction of the small and the large intestines.

The term "vermiform" comes from Latin and means "worm-shaped."

The appendix has been called a vestigial organ, but that interpretation may be changing.

Useful organ

Mark Frauenfelder of Boing Boing writes:

The appendix has evolved in different animal species at least 29 times, according to this SciShow video, which means it probably serves a function. Scientists who studied appendixes in animals have come to the conclusion that it is a part of the immune system. In humans, the appendix is full of immune cells, including T cells, B cells, and natural killer cells, and good gut bacteria.

• The appendix is not a useless organ @ Boing Boing

• Your Appendix Isn't Useless, After All @ YouTube

• Appendix (anatomy) @ Wikipedia