Medieval scholars considered human digestion to be a process similar to cooking. The processing of food in the stomach was seen as a continuation of the preparation initiated by the cook. In order for the food to be properly "cooked" and for the nutrients to be properly absorbed, it was important that the stomach be filled in an appropriate manner. Easily digestible foods would be consumed first, followed by gradually heavier dishes. If this regimen were not respected it was believed that heavy foods would sink to the bottom of the stomach, thus blocking the digestion duct, so that food would digest very slowly and cause putrefaction of the body and draw bad humours into the stomach. It was also of vital importance that food of differing properties not be mixed.