it is the alveoli..
Avlveoli
The smallest tube in the lungs is the Bronchus
The Air Sacs or The End of the Bronchioles.
Respiratory bronchioles end in alveolar sacs (alveoli).
alveoli. they are the basic functional unit of the lungs. it is where gas exchange occurs.
identify the part of the resperatory system which cluster of tiny thin walled sacs found at the end of leach bronchi
respiratory bronchioles
They are called alveoli
the Bronchioles, Air sacs and the Diaphragm
alveoli
If you are talking about in the lungs, it would be bronchioles.
Bronchioles.
Small airways (bronchioles) and lung sacs (alveoli). Bronchioles collapse, trapping air in alveoli, which then overstretch.