nares
where air enters the nose
vestibule
after the air enters the nose
nasal cavity
after the air enters the vestibule
nasopharynx
after the air enters the nasal cavity
oropharynx
after the air enters the nasopharynx
laryngopharynx
after the air enters the oropharynx
larynx
after the air enters the laryngopharynx
trachea
after the air enters the larynx
primary bronchi
after the air enters the trachea
secondary bronchi
after the air enters the primary bronchi
tertiary bronchi
after the air enters the secondary bronchi
bronchioles
after the air enters the tertiary bronchi
terminal bronchioles
after the air enters the bronchioles
alveolar ducts
after the air enters the terminal bronchioles
alveolar sacs
after the air enters the alveolar ducts
capillaries
after the air enters the alveolar sacs and exchanges gas here