How the body uses food
Food has nutrients in it— substances that give our body many important things that we need. They provide us with energy and also help control the way our body grows.
Before nutrients can go to work food must be broken down so that they can pass into our body. This is called digestion. It starts when we chew the food that we eat. When we swallow it it travels on to the stomach where it is mixed together with water and other fluids. Then the food is passed on to the intestine. Nutrients escape through the walls of the intestine into our blood. From there they are carried to all parts of the body.
Most food leaves waste that the body cannot use. Some of it goes to the kidneys and turns into urine. The liver also filters out waste. What is left over passes through the large intestine and leaves our body.