Lungs

[mickeyin]

what do the smallest lungs airways look like?

[Sligachan14]

Google image search for alveoli

[Peter Pedant]

If you are gonna say tha the end is not an airway, but the passage just before the end is, then you should be looking at alveolar duct I think and not the alveoli themselves which are sacs.

picky I know

[Toureman]

Like this........

http://www.med.uiuc.edu/histo/small/atlas/obje cts/637.htm

[Sligachan14]

http://www.getbodysmart.com/ap/respiratorysyst em/lungs/menu/menu.html