Ventilation

Noun

1. The replacement of stale or noxious air with fresh.
2. The mechanical system used to circulate and replace air.
3. An exchange of views during a discussion.
4. The public exposure of an issue or topic.
5. The bodily process of breathing; the inhalation of air to provide oxygen, and the exhalation of spent air to remove carbon dioxide.

   "This toxin impairs ventilation by causing inflammation in the bronchioles."