During digestion, your mouth and stomach do most of the work to get your food ready for your body to use. Their job is to break food down into tiny pieces. In the stomach, food is mixed with digestive juices to form a thick liquid called chyme. The food must be mixed well. Your stomach can sense when the chyme is ready to leave the stomach. Then it is ready to move on to the small intestine.
The job of the small intestine is to remove nutrients from the chyme. Nutrients are all of the good things that your body needs. Protein, carbohydrates, fats, vitamins, and minerals are all nutrients. The nutrients move from your small intestine to your blood. It carries the nutrients to all the parts of your body. The inside of your small intestine is covered with millions of villi. Villi are like fingers that stick out from the surface of the small intestine. These villi are how your small intestine pulls nutrients out of the chyme. They form grooves and crevices for chyme to flow into. This makes the surface area of the small intestine much larger than it looks. That means .....