Respiratory Tract Regions

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Respiratory Tract Regions
Anatomic feature
PSS-TLV Mass Fractions
Region

• nose
• mouth
• pharynx
• larynx

Inhalable Particulate Mass (IPM)
Nasopharyngeal

• trachea
• bronchioles
• terminal bronchioles

Thoracic Particulate Mass (TPM)
Tracheo-bronchial

• respiratory bronchioles
• alveolar ducts sacs
• alveoli

Respirable Particulate Mass (RPM)
Gas Exchange Region (GER)