I was reading some medical info the doctor gave us the other day in preparation for a family member's surgery, and it indicates that the appendix is now considered to be a 'storage area' for the beneficial bacteria our bowels need to digest food efficiently. (Those bacteria can be lost or their populations signficantly reduced when an individual has a long bout of particularly severe diarrhea or if an individual has significant surgery on their digestive system.)
With the advent of global travel, distinctions among races will cease.