The blood transports these gases, carrying oxygen to the tissues and carbon dioxide to the lungs. To review the major organs of the respiratory system. To examine the structures of the respiratory zone of the lungs. To explore the microscopic anatomy of an alveolus. Trace the pathway of air from the outside of the body into the body.
Air enters the nose through the external nares.
Describe the location of the parietal pleura. A thin layer of pleural fluid. The many branching airways that are found in the lungs Trace the pathway of air from the trachea to the respiratory zone. Describe the difference between bronchi and bronchioles in terms of smooth muscle and cartilage. Bronchi have rings of cartilage that keep them open.