Related Words

Alveoli: Tiny, thin-walled, inflatable sacs in the lungs where oxygen and carbon dioxide are exchanged.

Asthma: A respiratory disorder caused by allergies that constrict the bronchioles by inducing spasms in the muscles surrounding the lungs, by causing the bronchioles to swell, or by clogging the bro . . . View Full Definition

Airway: The passages which transfer air from the outside environment to the lungs: the tracha, bronchi, bronchioles and alveoli

Lungs: Sac-like structures of varying complexity where blood and air exchange oxygen and carbon dioxide; connected to the outside by a series of tubes and a small opening. In humans, the lungs are . . . View Full Definition

Bronchioles: Small tubes in the lungs that are formed by the branching of the bronchi; terminate in the alveoli.