The stomach is the place where food and liquids that pass from the esophagus are stored and prepared for digestion. The upper part of the stomach is called the fundus. This part of the stomach stretches to make room for large meals. The food and liquid is then ground up by the lower part of stomach, call the antrum. As the food is broken down to tiny particles, stomach juices, including acid and pepsin, begin to break down the food further. Liquids tend to leave the stomach first. When the food is small enough, it passes through the pyloric valve, into the small bowel.