Lung physiology Brain-stem 1. Controller: rhythm 2. Muscle: strong 3. Airway: patent 4. Alveolar: dry 5. Vasculature: intact BSec dl vati aton 2 Efec of Pacm haemoglobin on veat at CO2 normal haemoglobin Paco, erm Hg)Lung physiology Brain-stem 1. Controller: rhythm 2. Muscle: strong 3. Airway: patent 4. Alveolar: dry 5. Vasculature: intact O2 CO2