The Non-Vestigial Appendix
There is, at a glance, an insignificant blob of flesh in the digestive system. Long derided as "vestigial," is the appendix. Because of evolutionary thinking, it has been surgically removed from people. Vestigial structures are considered leftovers from our evolutionary ancestry, so we do not need these vestiges anymore.
Like other so-called vestigial organs, it has been discovered that the appendix is important. Evolutionists and much of the medical science community believed stories about the past without using empirical evidence. Like "junk" DNA, they didn't understand something's function, so they labeled it as useless.
In humans and some other mammals, there is a worm-shaped appendage, protruding from the cecum, known as the appendix (also called the ‘vermiform appendix’ or ‘cecal appendix’). Charles Darwin argued that this was a ‘vestigial organ’, a useless remnant of something that our distant ancestors used way back in our evolutionary history, when we supposedly ate mostly vegetation such as leaves. As our diet changed, our digestive system supposedly evolved, causing a previously much larger cecum to shrink, leaving a useless remnant in the form of the appendix.
If you have the guts (I had to do that) to read the entire article, see "The appendix — Functional, but still evidence for evolution?"