Question

Which best describes carbon dioxide’s path out of the body?

nose → pharynx → larynx → trachea → bronchus → alveoli
alveoli → trachea → bronchus → larynx → pharynx → nose
alveoli → bronchus → trachea → larynx → pharynx → nose
nose → larynx → pharynx → trachea → bronchus → alveoli

Answer 1

alveoli → bronchus → trachea → larynx → pharynx → nose

Explanation: During exhalation CO2 moves from the alveoli into the bronchi (and bronchioles), up the trachea, through the larynx and pharynx, and out the nose (or mouth).