If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

The respiratory system


Once air has passed into the body via the nostrils, it moves down into a network of passages in the lungs.
From the options below, identify the correct order in which air travels through structures in the lungs.
Choose 1 answer: