A friend told me several days ago about some new research about the appendix. Far from being a vestigial organ, the appendix has immune functions.
But wait - there's more!
If you've ever taken a course of antibiotics, you've likely depleted the "good" bacteria in your intestine as well as the "bad" bacteria you were trying to fight. The appendix actually replenishes those good bacteria; it acts as a storehouse or rebooter for the intestinal flora.
As I've believed all along, God never designed a truly useless organ.