Steps in the mechanism of breathing
1️⃣ Inhalation: Diaphragm and chest muscles contract
2️⃣ Oxygen is taken into the lungs
3️⃣ Air flows through the trachea, bronchi, and into the alveoli
4️⃣ Gas exchange occurs in the alveoli
5️⃣ Exhalation: Diaphragm and chest muscles relax
6️⃣ Carbon dioxide is expelled from the lungs