Let's keep learning about the respiratory system!
We now that the lungs are where you store air you breathe in, the trachea is the big tube in your throat that carries air down toward your lungs, and the bronchi are the tubes that go left and right to each of your lungs.
When the air gets to the end of your bronchi, it gets to your bronchioles.
You can almost think of it like a tree. The trachea is the trunk, the bronchi are two big branches, and the bronchioles are a whole bunch of smaller branches.
(from: wikipedia - bronchiole)
Kid Facts - Blast from the past: Facial Skeleton
