Question

if one inspires through their nose, which of the following answers has the correct order of structures the air would move through?
multiple choice
nares → nasal cavity → vestibule → nasopharynx → oropharynx → laryngopharynx → larynx → trachea → primary bronchus → secondary bronchus → tertiary bronchus → bronchiole → terminal bronchiole → respiratory bronchiole → alveolar duct → alveolar sac → alveolus
nares → vestibule → nasal cavity → nasopharynx → oropharynx → laryngopharynx → larynx → trachea → primary bronchus → secondary bronchus → tertiary bronchus → bronchiole → terminal bronchiole → respiratory bronchiole → alveolar duct → alveolar sac → alveolus
nares → nasal cavity → vestibule → nasopharynx → oropharynx → laryngopharynx → larynx → trachea → primary bronchus → secondary bronchus → tertiary bronchus → bronchiole → respiratory bronchiole → terminal bronchiole → alveolar duct → alveolar sac → alveolus
nares → vestibule → nasal cavity → nasopharynx → oropharynx → laryngopharynx → larynx → trachea → bronchiole → respiratory bronchiole → terminal bronchiole → primary bronchus → secondary bronchus → tertiary bronchus → alveolar duct → alveolar sac → alveolus

Explanation:

When air is inspired through the nose, it first enters the nares (nostrils). Then it goes to the vestibule (the anterior part of the nasal cavity), followed by the nasal cavity. After that, it moves through the nasopharynx, oropharynx, laryngopharynx, larynx, trachea, primary bronchus, secondary bronchus, tertiary bronchus, bronchiole, terminal bronchiole, respiratory bronchiole, alveolar duct, alveolar sac, and finally the alveolus. The correct order should have vestibule before nasal cavity in terms of the air - flow path as the vestibule is the immediate area after the nares.

Answer:

Nares → Vestibule → Nasal Cavity → Nasopharynx → Oropharynx → Laryngopharynx → Larynx → Trachea → Primary Bronchus → Secondary Bronchus → Tertiary Bronchus → Bronchiole → Terminal Bronchiole → Respiratory Bronchiole → Alveolar Duct → Alveolar Sac → Alveolus (the second option in the original multiple - choice list)