Structure

• What structures are included in the upper respiratory tract?

  nose, nasal cavity, pharynx, epiglottis, larynx, trachea
• What is the purpose of the upper respiratory tract?

  To moisten and filter air going into the lungs
• What structures are included in the lower respiratory tract?

  bronchi, bronchioles, alveolar ducts, alveoli
• What is the purpose of the lower respiratory tract?

  For gas exchange