Nasal cavity, Nasopharynx , Oropharynx, Laryngopharynx, Pharynx, Larynx, Treachea, Left and Right primary bronchi, Upper respiratory tract, Lower respiratory tract , Alveolar sac, Bronchioles', Alveoli, Alveolar duct , Bronchioles, Pulmonary capillary.

Unit 6: Respiratory System

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