The gallbladder concentrates and stores bile as a pear-shaped sac which it can release to help digestion after a fatty meal.
Appetite is basically the desire to eat food, it manifests itself as hunger. A healthy appetite is important for sufficient energy intake so that essential metabolic activities can be carried out. A regulated appetite is necessary for leading a normal lifestyle. Appetite-related conditions include anorexia, bulimia, polyphagia, and cachexia.