The exchange of gases [O2 and CO2] in a mammal takes place in
Trachea
Bronchi
Bronchioles
Alveoli
Alveoli are the tiny sac-like structures which provide the interphase for the exchange of O2 and CO2.
During respiration, the exchange of gases takes place in : (a) bronchi (b) alveoli (c) bronchioles (d) trachea
The actual exchange of gases in a mammal takes place in