1. The process of respiration is inhaling oxygen and exhaling carbon dioxide.
2. Lungs, Bronchus, Trachea, Larynx, Pharynx, Bronchiole, and Pulmonary Alveolus
3. Our bodies use more oxygen which produces more carbon dioxide. To fulfill the body's needs, your breathing has to increase from about 15 times a minute to about 40–60 times a minute.