if you stop breathing is it your heart or lungs that cause that
Second Cause of Shortness of Breath: Too Little Airflow Most of the time, when folks think of having difficulty breathing, they think of problems getting air into the lungs. Anything that restricts airflow deep into the lungsâall the way into the small sacs (alveoli)âgets in the way of moving oxygen into the bloodstream and moving carbon dioxide out of the bloodstream.