Illustrates the respiratory system from the frontal sinus to the diaphragm. * Includes views of the paranasal sinuses, larynx, and bronchopulmonary segments. * Also shows the structure of intrapulmonary airways and the cross section of alveolus. * Discusses the conducting system, lungs and pleurae, ventilation and gas exchange. * Size is 20 inches by 26 inches - Heavy Paper.