Not so weird. The gall bladder stores and concentrates bile from the liver to be released into the digestive tract to help digest fat. The appendix, while once considered to be a useless vestigial organ, is now known known to be an incubator and storage place for the “good” gut bacteria to help keep your digestive systems microbiology in balance and to help “reboot” the balance after episodes of diarrhea. It is a well protected reserve which is why antibiotics are generally ineffective against appendicitis.