Answer:
bronchi, bronchioles
Step-by-step explanation:
Although I'm not completely sure what you mean by "From the shed", this is how the air travels:
When you breath in through your mouth or nose, the air travels down to the tube called the trachea (the bones at the front of your neck). The trachea leads down and splits into two tubes called bronchi, which feed into each of your two lungs. The two bronchi branch out into smaller tubes called bronchioles. After passing bronchioles, the air reaches air sacs called alveoli, which is where transferring oxygen and carbon dioxide gas happens.
"...the bronchi branch out into smaller rubes called bronchioles."
Here's a diagram with some simpler information.