The stomach is a muscular sac that is important for absorbing food and preparing food for further digestion.
The principle of layered eating functions on the belief that food is digested in layers. Proponents of layered eating concur that we can manage our weight and avoid digestive problems by eating high volume low calorie foods first followed by low volume high calorie foods. As a rule the most watery foods should be eaten first and all food items should be chewed thoroughly. High calorie food items take longer to exit the stomach and reach the intestine and therefore should be consumed in less quantity to prevent their putrefaction in the stomach.