Digestion, breathing and clean habitats

When you eat flatbread, your body must break it into tiny parts it can use. This job is done by the digestive system, a team of body parts. Your teeth cut and grind the food in your mouth, and saliva makes it wet. When you swallow, the food slides down the food pipe to the stomach. The stomach squeezes and mixes the food with strong stomach juices until it is a thick liquid. Next the food moves into the small intestine. There the nutrients pass into the blood, and the blood carries them to every part of the body. What the body cannot use goes into the large intestine, which takes back the water. The rest leaves the body as waste. The whole journey takes many hours.