It is, if you're reading biology textbooks from thirty years ago. The appendix is part of the lymphatic system, involved in keeping your body free of disease-causing critters.
Two articles to support this:
http://www.abc.net.au/news/stories/2...10/2055374.htm
http://www.answersingenesis.org/crea...1/appendix.asp
Utter nonsense, with absolutely no scientific evidence to back it up. That's just another bit of diatribe from the evolutionists being crammed down people's throats to make them think that man is no more than an 'evolved monkey'. But I digress; this is more the stuff for the 'Off Topic' section of these boards.