Question

Alveoli are microscopic air sacs branching off the

Answer 1

The bronchi continue to divide into smaller and smaller branches until they end in air sacs. The air sacs in the lungs are called alveoli.Well if your talking about the air sacs in your lungs then they are the sacs of air that contain air...

Answer 2

Alveoli is the branching of brhoncus in the lungs.