THE ?LUNG ? MODEL ? OBJECTIVES ?? To create a lung model to show the effects of inhalation and exhalation and the effects of respiratory diseases on the function of lungs. PARTS OF THE RESPIRATORY SYSTEM 1. ?Trachea ? 2. ?Lungs ? 3. ?Diaphragm ? RECAP ?I: ?INHALATION ? 1.?Diaphragm ? contracts ?and ? ?a?ns ? 2.?Rib ?cage ?moves ?up ? and ?out ? ? ?? Thoracic ?cavity ? enlarges ? ?? Lower ?pressure ? within ?the ?lungs ? ?? Air ?enters ?the ? lungs ? RECAP ?II: ?EXHALATION ? 1.?Diaphragm ?relaxes ? and ?moves ?up ? 2.?Rib ?cage ?moves ? ? down ?and ?in. ? ? ?? Rib ?cage ?presses ? on ?the ?lungs ? ?? Air ?is ?forced ?out ?