"The Spleen and Stomach are the two primary organs of digestion. The Stomach is like the sous-chef, accepting the food as it comes into the kitchen and chopping it , organizing it, and making it ready for the soup that the Spleen is responsible for cooking. The Spleen is like a bubbling cauldron. As it begins to cook the food sent over (metaphorically-speaking) by the Stomach, steam arises from that bubbling cauldron. The steam is the Qi, or the fuel, that all the other organs in the body need in order to function properly. "