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After entering your stomach, the pie is broken down further. With its powerful muscles, the stomach begins churning and mixing the food into smaller and smaller pieces. Your digestive glands in your stomach lining produce stomach acid and enzymes, which mix with the food to form a murky semifluid or paste called chyme.

Once the chyme is well-mixed, waves of muscle contractions propel it through a valve called the pylorus and into the first section of your small intestine (duodenum). The pylorus might release about an eighth of an ounce (about 4 milliliters) of chyme at a time. The rest is held back for more mixing.

Sept. 27, 2018