What really happens when you breathe? 🫁 Part 1 Your lungs are amazing organs, and at their core are tiny air sacs called alveoli, where oxygen enters your bloodstream, and carbon dioxide is expelled. But have you ever wondered how your lungs stay clean despite all the particles you breathe in every day? When you inhale, air travels through your trachea, bronchi, and bronchioles, finally reaching these tiny, balloon-like structures. While the alveoli handle the important job of gas exchange, the