How Does Our Body Turn Air into Breath?

You breathe because your body is like a team of inflating balloons. When you inhale, your diaphragm, which looks like a flat muscle under your lungs, moves down to make more room for air to come in. Your ribs also help by moving up and out. This makes your chest bigger, letting the air rush into your lungs. Once you breathe in, the air goes through tiny tubes inside your lungs called bronchi and finally ends up in little air sacs called alveoli, where oxygen moves into your blood. When you exhale, your diaphragm goes back up, pushing the air out.