none of them because they have cigarette budds in tem
alveolus
The smallest tube in the lungs is the Bronchus
I believe the smallest are the alveoli (air sacs), since there are millions of them in the lungs.
Bronchioles..
the alvioli
alveoli
alveoli
Alveoli are at the ends of the bronchioles.
Alveoli are at the ends of the bronchioles.
alveoli novnet
Respiratory bronchioles and the alveoli are the smallest part in case of the lungs. There are millions of them in your lungs.
The bronchial tubes (or bronchi) are the large tubular structures within the lungs. These carry air into the lungs from the trachea. They branch into smaller tubes called bronchioles, and then to the smallest tubes that contain the alveoli (air sacs) of the lungs.
Alveoli are the smallest functional units of the lungs. Therefore, they belong to the respiratory system.