read this http://www.mercola.com/2002/feb/13/gall_bladder.htm - not very interactive stuff but I liked the anology - but hey , what do I know about biology!! The gallbladder serves an important digestive function. It is required to emulsify fats. What is emulsification? One can easily understand this concept when washing greasy dishes. It is nearly impossible to properly clean greasy dishes without soap as the soap emulsifies the fat so it can be removed.