We usually don’t have to think much about our breathing because our brain controls it automatically. When you have a lot of carbon dioxide the waste gas produced by body processes in our blood, our brain gets the message and tells our lungs to exhale and get rid of it. This action then causes us to inhale, drawing in air that eventually delivers oxygen to every cell in our body. This carefully regulated exhaling and inhaling takes place about 10 to 14 times each minute when we are breathing calmly.
