 Nose  Pharynx  Larynx  Trachea  Bronchi  Bronchioles  Alveoli  Lungs

Carbon Dioxide is dropped off Oxygen is picked up Capillary Red Blood Cell Wall of the Air Sac

 Do you exercise?  Do you know what cardio-respiratory endurance is?  You are not only improving the efficiency of your heart, you are also improving your lung efficiency and capacity  Do you practice good personal hygiene?  Do you wash your hands to help prevent infections of the respiratory system