You should check if you friend have oral herpes aand if he does them go to the octor
<span>The lungs are the respiratory structure that controls breathing. They make up a substantial part of the respiratory system, along with the trachea, the ribs, the intercostal muscles and the diaphragm. Each lung contains small tubes called bronchioles which end in air sacs called alveoli.</span>
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Maybe a backbend or just Yoga.
Explanation:
I'm sorry I couldn't help
Avoiding secondhand smoke can help prevent lung cancer.