Breathing

Breathing is when you breath in the oxygen around you through your nose or mouth. Then the oxygen goes down your airways which brings the oxygen down to your lungs. After that it keeps your body working. Blood is pumped into the lungs by the right lower chamber of the heart, called the right ventricle. It then returns to the left upper chamber, called the left atrium, and flows into the left ventricle, which pumps it to the rest of the body.