The partially digested food enters the duodenum as a thick semi-liquid chyme. Food from the stomach, as chyme, passes through the pylorus to the duodenum. The microvilli absorb fats and nutrients from the chyme. Unlike peristalsis, segmentation actually can slow progression of chyme through the system. When the chyme is fully digested, it is absorbed into the blood. The first receptacle for this chyme is the duodenal bulb. This layer comes in direct contact with digested food (chyme). This allows for thorough mixing of intestinal contents, known as chyme, to allow greater absorption. With a pH of approximately 2, chyme emerging from the stomach is very acidic. These micelles are suspended in the chyme before further processing. After hours of mechanical and chemical digestion, food has been reduced into chyme. The remaining chyme is passed to the colon. Compare "enchyma", "tissue infused with organic juice"; elaboration from chyme, the formative juice of tissues. When the air is released, it carries small amounts of chyme with it. After an hour or two, a thick semi-liquid called chyme is produced.