This is an alternate content page containing an Ordering Activity. It has opened in a new window.
The activity has a list of items. Put the items in the correct order.

Item 1: Alveolar Sacs
Item 2: Bronchioles
Item 3: Trachea
Item 4: Primary Bronchi
Item 5: Alveoli
Item 6: Secondary Bronchi
Item 7: Tertiary Bronchi
Item 8: Alveolar Ducts