The orifice of the vermiform appendix lies an inch lower, at McBurney's point.
From the en.wikipedia.org
Appendicitis is inflammation of the vermiform appendix located at the caecum.
From the en.wikipedia.org
For non-cavers who read it, the sensation of being trapped in Mother Earth's vermiform appendix is persuasively real, and the impulse to run gasping into the open air is strong.