none of them because they have cigarette budds in tem
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.
the alvioli
Bronchioles..
alveoli
alveoli
alveoli novnet
Alveoli are at the ends of the bronchioles.
Alveoli are at the ends of the bronchioles.
Respiratory bronchioles and the alveoli are the smallest part in case of the lungs. There are millions of them in your lungs.
The tubes that air travels through to the lungs are the trachea, which leads to the bronchi (singular: bronchus), then to smaller bronchioles, and finally to the alveoli where gas exchange occurs in the 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.