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the bronchiole
Alveoli
bronchioles
Alveoli
The structure in the lungs that contains the thinnest epithelium is the alveoli. Alveoli are air sacs where the exchange of gases takes place.
alveoli
ALVEOLI
alveoli
Internal and external? 4real
the alveoli
one feature is that an alveoli has a wide surface area. If you know any other features then add them!