Protect Your Lungs from Long-Term Illness Each time you inhale, your lungs bring in oxygen that fuels your entire body. This oxygen travels through your blood to nourish every cell. When you exhale, your body releases carbon dioxide, a waste product produced during energy use. If any part of your breathing process is disrupted, your health and daily routine can be affected. Lung conditions can appear through various symptoms. You might experience persistent coughing, wheezing, or have trouble