Respiration I. Background A. Function 1. Supply body with oxygen and dispose of carbon dioxide B. Processes 1. Pulmonary ventilation a. Moving air in and out of lungs 2. External respiration a. Gas exchange between blood and chambers of lungs 3. Transport of respiratory gases a. Gases must be transported between lungs and tissue cells of the body i . Accomplished by cardiovascular system 4. Internal respiration a. Gas exchanges between blood and tissue cells II. Anatomy of the Respiratory System A. Organs 1. Nose 2. Nasal cavity 3. Pharynx 4. Larynx 5. Trachea 6. Bronchi 7. Lungs a. Alveoli B. Respiratory zone 1. Site of gas exchange a. Respiratory bronchioles b. Alveolar ducts c. Alveoli d. Microscopic structures C. Conducting zone 1. Conduits that provide air to reach respiratory zone